Convert CONFIG_BOARD_EARLY_INIT_F to Kconfig

This converts the following to Kconfig:
   CONFIG_BOARD_EARLY_INIT_F

Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/arch/arm/cpu/armv8/fsl-layerscape/Kconfig b/arch/arm/cpu/armv8/fsl-layerscape/Kconfig
index d93a61d..47897f4 100644
--- a/arch/arm/cpu/armv8/fsl-layerscape/Kconfig
+++ b/arch/arm/cpu/armv8/fsl-layerscape/Kconfig
@@ -6,6 +6,7 @@
 	select SYS_FSL_MMDC
 	select SYS_FSL_ERRATUM_A010315
 	select ARCH_EARLY_INIT_R
+	select BOARD_EARLY_INIT_F
 
 config ARCH_LS1043A
 	bool
@@ -24,6 +25,7 @@
 	select SYS_FSL_HAS_DDR3
 	select SYS_FSL_HAS_DDR4
 	select ARCH_EARLY_INIT_R
+	select BOARD_EARLY_INIT_F
 
 config ARCH_LS1046A
 	bool
@@ -41,6 +43,7 @@
 	select SYS_FSL_HAS_DDR4
 	select SYS_FSL_SRDS_2
 	select ARCH_EARLY_INIT_R
+	select BOARD_EARLY_INIT_F
 
 config ARCH_LS2080A
 	bool
@@ -66,6 +69,7 @@
 	select SYS_FSL_ERRATUM_A009942
 	select SYS_FSL_ERRATUM_A010165
 	select ARCH_EARLY_INIT_R
+	select BOARD_EARLY_INIT_F
 
 config FSL_LSCH2
 	bool