diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index cee3126..1c7cf7f 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -64,6 +64,7 @@
 
 choice
 	prompt "Target select"
+	optional
 
 config ARCH_AT91
 	bool "Atmel AT91"
diff --git a/arch/arm/cpu/armv7/exynos/Kconfig b/arch/arm/cpu/armv7/exynos/Kconfig
index f6084ac..c614425 100644
--- a/arch/arm/cpu/armv7/exynos/Kconfig
+++ b/arch/arm/cpu/armv7/exynos/Kconfig
@@ -2,6 +2,7 @@
 
 choice
 	prompt "EXYNOS board select"
+	optional
 
 config TARGET_SMDKV310
 	select SUPPORT_SPL
diff --git a/arch/arm/cpu/armv7/mx5/Kconfig b/arch/arm/cpu/armv7/mx5/Kconfig
index 2d6c0ce..9f250c6 100644
--- a/arch/arm/cpu/armv7/mx5/Kconfig
+++ b/arch/arm/cpu/armv7/mx5/Kconfig
@@ -12,6 +12,7 @@
 
 choice
 	prompt "MX5 board select"
+	optional
 
 config TARGET_USBARMORY
 	bool "Support USB armory"
diff --git a/arch/arm/cpu/armv7/mx6/Kconfig b/arch/arm/cpu/armv7/mx6/Kconfig
index 076ba52..1282be3 100644
--- a/arch/arm/cpu/armv7/mx6/Kconfig
+++ b/arch/arm/cpu/armv7/mx6/Kconfig
@@ -27,6 +27,7 @@
 
 choice
 	prompt "MX6 board select"
+	optional
 
 config TARGET_SECOMX6
 	bool "Support secomx6 boards"
diff --git a/arch/arm/cpu/armv7/omap3/Kconfig b/arch/arm/cpu/armv7/omap3/Kconfig
index cc82c50..b32a6b0 100644
--- a/arch/arm/cpu/armv7/omap3/Kconfig
+++ b/arch/arm/cpu/armv7/omap3/Kconfig
@@ -2,6 +2,7 @@
 
 choice
 	prompt "OMAP3 board select"
+	optional
 
 config TARGET_AM3517_EVM
 	bool "AM3517 EVM"
diff --git a/arch/arm/cpu/armv7/omap4/Kconfig b/arch/arm/cpu/armv7/omap4/Kconfig
index eccf897..df27ea1 100644
--- a/arch/arm/cpu/armv7/omap4/Kconfig
+++ b/arch/arm/cpu/armv7/omap4/Kconfig
@@ -2,6 +2,7 @@
 
 choice
 	prompt "OMAP4 board select"
+	optional
 
 config TARGET_DUOVERO
 	bool "OMAP4430 Gumstix Duovero"
diff --git a/arch/arm/cpu/armv7/omap5/Kconfig b/arch/arm/cpu/armv7/omap5/Kconfig
index aca862d..20c3bd9 100644
--- a/arch/arm/cpu/armv7/omap5/Kconfig
+++ b/arch/arm/cpu/armv7/omap5/Kconfig
@@ -2,6 +2,7 @@
 
 choice
 	prompt "OMAP5 board select"
+	optional
 
 config TARGET_CM_T54
 	bool "CompuLab CM-T54"
diff --git a/arch/arm/cpu/armv7/rmobile/Kconfig b/arch/arm/cpu/armv7/rmobile/Kconfig
index 57dccec..ae23078 100644
--- a/arch/arm/cpu/armv7/rmobile/Kconfig
+++ b/arch/arm/cpu/armv7/rmobile/Kconfig
@@ -2,6 +2,7 @@
 
 choice
 	prompt "Renesus ARM SoCs board select"
+	optional
 
 config TARGET_ARMADILLO_800EVA
 	bool "armadillo 800 eva board"
diff --git a/arch/arm/cpu/armv7/s5pc1xx/Kconfig b/arch/arm/cpu/armv7/s5pc1xx/Kconfig
index bc73813..04acdaa 100644
--- a/arch/arm/cpu/armv7/s5pc1xx/Kconfig
+++ b/arch/arm/cpu/armv7/s5pc1xx/Kconfig
@@ -2,6 +2,7 @@
 
 choice
 	prompt "S5PC1XX board select"
+	optional
 
 config TARGET_S5P_GONI
 	bool "S5P Goni board"
diff --git a/arch/arm/mach-at91/Kconfig b/arch/arm/mach-at91/Kconfig
index b660a5b..7dfa520 100644
--- a/arch/arm/mach-at91/Kconfig
+++ b/arch/arm/mach-at91/Kconfig
@@ -2,6 +2,7 @@
 
 choice
 	prompt "Atmel AT91 board select"
+	optional
 
 config TARGET_AT91RM9200EK
 	bool "Atmel AT91RM9200 evaluation kit"
diff --git a/arch/arm/mach-bcm283x/Kconfig b/arch/arm/mach-bcm283x/Kconfig
index c740180..99779df 100644
--- a/arch/arm/mach-bcm283x/Kconfig
+++ b/arch/arm/mach-bcm283x/Kconfig
@@ -3,6 +3,7 @@
 
 choice
 	prompt "Broadcom BCM283X board select"
+	optional
 
 config TARGET_RPI
 	bool "Raspberry Pi"
diff --git a/arch/arm/mach-davinci/Kconfig b/arch/arm/mach-davinci/Kconfig
index 3ef55d3..e6cb390 100644
--- a/arch/arm/mach-davinci/Kconfig
+++ b/arch/arm/mach-davinci/Kconfig
@@ -2,6 +2,7 @@
 
 choice
 	prompt "DaVinci board select"
+	optional
 
 config TARGET_ENBW_CMC
 	bool "EnBW CMC board"
diff --git a/arch/arm/mach-integrator/Kconfig b/arch/arm/mach-integrator/Kconfig
index 8ffc544..c54d69d 100644
--- a/arch/arm/mach-integrator/Kconfig
+++ b/arch/arm/mach-integrator/Kconfig
@@ -3,6 +3,7 @@
 
 choice
 	prompt "Integrator platform select"
+	optional
 
 config ARCH_INTEGRATOR_AP
 	bool "Support Integrator/AP platform"
@@ -18,6 +19,7 @@
 
 choice
 	prompt "Integrator core module select"
+	optional
 
 config CM720T
 	bool "Core Module for ARM720T"
diff --git a/arch/arm/mach-keystone/Kconfig b/arch/arm/mach-keystone/Kconfig
index 134ae87..67f1a33 100644
--- a/arch/arm/mach-keystone/Kconfig
+++ b/arch/arm/mach-keystone/Kconfig
@@ -2,6 +2,7 @@
 
 choice
 	prompt "TI Keystone board select"
+	optional
 
 config TARGET_K2HK_EVM
 	bool "TI Keystone 2 Kepler/Hawking EVM"
diff --git a/arch/arm/mach-kirkwood/Kconfig b/arch/arm/mach-kirkwood/Kconfig
index 45c6687..1261885 100644
--- a/arch/arm/mach-kirkwood/Kconfig
+++ b/arch/arm/mach-kirkwood/Kconfig
@@ -2,6 +2,7 @@
 
 choice
 	prompt "Marvell Kirkwood board select"
+	optional
 
 config TARGET_OPENRD
 	bool "Marvell OpenRD Board"
diff --git a/arch/arm/mach-nomadik/Kconfig b/arch/arm/mach-nomadik/Kconfig
index 265f336..ba72a41 100644
--- a/arch/arm/mach-nomadik/Kconfig
+++ b/arch/arm/mach-nomadik/Kconfig
@@ -2,6 +2,7 @@
 
 choice
 	prompt "Nomadik board select"
+	optional
 
 config NOMADIK_NHK8815
 	bool "ST 8815 Nomadik Hardware Kit"
diff --git a/arch/arm/mach-orion5x/Kconfig b/arch/arm/mach-orion5x/Kconfig
index 291c511..7644b8d 100644
--- a/arch/arm/mach-orion5x/Kconfig
+++ b/arch/arm/mach-orion5x/Kconfig
@@ -2,6 +2,7 @@
 
 choice
 	prompt "Marvell Orion board select"
+	optional
 
 config TARGET_EDMINIV2
 	bool "LaCie Ethernet Disk mini V2"
diff --git a/arch/arm/mach-socfpga/Kconfig b/arch/arm/mach-socfpga/Kconfig
index 204efca..e46c348 100644
--- a/arch/arm/mach-socfpga/Kconfig
+++ b/arch/arm/mach-socfpga/Kconfig
@@ -2,6 +2,7 @@
 
 choice
 	prompt "Altera SOCFPGA board select"
+	optional
 
 config TARGET_SOCFPGA_ARRIA5
 	bool "Altera SOCFPGA Arria V"
diff --git a/arch/arm/mach-tegra/Kconfig b/arch/arm/mach-tegra/Kconfig
index 8bab594..9b42871 100644
--- a/arch/arm/mach-tegra/Kconfig
+++ b/arch/arm/mach-tegra/Kconfig
@@ -2,6 +2,7 @@
 
 choice
 	prompt "Tegra SoC select"
+	optional
 
 config TEGRA20
 	bool "Tegra20 family"
diff --git a/arch/arm/mach-tegra/tegra114/Kconfig b/arch/arm/mach-tegra/tegra114/Kconfig
index 31012bc..1047b92 100644
--- a/arch/arm/mach-tegra/tegra114/Kconfig
+++ b/arch/arm/mach-tegra/tegra114/Kconfig
@@ -2,6 +2,7 @@
 
 choice
 	prompt "Tegra114 board select"
+	optional
 
 config TARGET_DALMORE
 	bool "NVIDIA Tegra114 Dalmore evaluation board"
diff --git a/arch/arm/mach-tegra/tegra124/Kconfig b/arch/arm/mach-tegra/tegra124/Kconfig
index 88f627c..36bb636 100644
--- a/arch/arm/mach-tegra/tegra124/Kconfig
+++ b/arch/arm/mach-tegra/tegra124/Kconfig
@@ -2,6 +2,7 @@
 
 choice
 	prompt "Tegra124 board select"
+	optional
 
 config TARGET_JETSON_TK1
 	bool "NVIDIA Tegra124 Jetson TK1 board"
diff --git a/arch/arm/mach-tegra/tegra20/Kconfig b/arch/arm/mach-tegra/tegra20/Kconfig
index 7f09f81..1bb8dff 100644
--- a/arch/arm/mach-tegra/tegra20/Kconfig
+++ b/arch/arm/mach-tegra/tegra20/Kconfig
@@ -2,6 +2,7 @@
 
 choice
 	prompt "Tegra20 board select"
+	optional
 
 config TARGET_HARMONY
 	bool "NVIDIA Tegra20 Harmony evaluation board"
diff --git a/arch/arm/mach-tegra/tegra30/Kconfig b/arch/arm/mach-tegra/tegra30/Kconfig
index 3abdc7b..e78331e 100644
--- a/arch/arm/mach-tegra/tegra30/Kconfig
+++ b/arch/arm/mach-tegra/tegra30/Kconfig
@@ -2,6 +2,7 @@
 
 choice
 	prompt "Tegra30 board select"
+	optional
 
 config TARGET_APALIS_T30
 	bool "Toradex Apalis T30 board"
diff --git a/arch/arm/mach-uniphier/Kconfig b/arch/arm/mach-uniphier/Kconfig
index 288e6ab..2d27c49 100644
--- a/arch/arm/mach-uniphier/Kconfig
+++ b/arch/arm/mach-uniphier/Kconfig
@@ -9,6 +9,7 @@
 
 choice
 	prompt "UniPhier SoC select"
+	optional
 
 config MACH_PH1_PRO4
 	bool "PH1-Pro4"
diff --git a/arch/arm/mach-zynq/Kconfig b/arch/arm/mach-zynq/Kconfig
index 1046ece..483c3a0 100644
--- a/arch/arm/mach-zynq/Kconfig
+++ b/arch/arm/mach-zynq/Kconfig
@@ -2,6 +2,7 @@
 
 choice
 	prompt "Xilinx Zynq board select"
+	optional
 
 config TARGET_ZYNQ_ZED
 	bool "Zynq ZedBoard"