Convert CONFIG_CMD_SATA to Kconfig

This converts the following to Kconfig:
   CONFIG_CMD_SATA

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
diff --git a/arch/arm/cpu/armv7/mx6/Kconfig b/arch/arm/cpu/armv7/mx6/Kconfig
index 4fd60d4..1e5dc9a 100644
--- a/arch/arm/cpu/armv7/mx6/Kconfig
+++ b/arch/arm/cpu/armv7/mx6/Kconfig
@@ -77,6 +77,7 @@
 	bool "Advantech dms-ba16"
 	select BOARD_LATE_INIT
 	select MX6Q
+	imply CMD_SATA
 
 config TARGET_APALIS_IMX6
 	bool "Toradex Apalis iMX6 board"
@@ -85,6 +86,7 @@
 	select DM
 	select DM_SERIAL
 	select DM_THERMAL
+	imply CMD_SATA
 
 config TARGET_ARISTAINETOS
 	bool "aristainetos"
@@ -141,6 +143,7 @@
 config TARGET_GW_VENTANA
 	bool "gw_ventana"
 	select SUPPORT_SPL
+	imply CMD_SATA
 
 config TARGET_KOSAGI_NOVENA
 	bool "Kosagi Novena"
@@ -302,6 +305,7 @@
 config TARGET_OT1200
 	bool "Bachmann OT1200"
 	select SUPPORT_SPL
+	imply CMD_SATA
 
 config TARGET_PICO_IMX6UL
 	bool "PICO-IMX6UL-EMMC"
diff --git a/arch/arm/mach-mvebu/Kconfig b/arch/arm/mach-mvebu/Kconfig
index 89476a6..3e48d58 100644
--- a/arch/arm/mach-mvebu/Kconfig
+++ b/arch/arm/mach-mvebu/Kconfig
@@ -57,6 +57,7 @@
 config MV78260
 	bool
 	select ARMADA_XP
+	imply CMD_SATA
 
 config MV78460
 	bool
@@ -113,6 +114,7 @@
 	bool "Support theadorable Armada XP"
 	select BOARD_LATE_INIT if USB
 	select MV78260
+	imply CMD_SATA
 
 config TARGET_CONTROLCENTERDC
 	bool "Support CONTROLCENTERDC"