Convert CONFIG_ARCH_EARLY_INIT_R to Kconfig

This converts the following to Kconfig:
   CONFIG_ARCH_EARLY_INIT_R

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 ba411e2..d93a61d 100644
--- a/arch/arm/cpu/armv8/fsl-layerscape/Kconfig
+++ b/arch/arm/cpu/armv8/fsl-layerscape/Kconfig
@@ -5,6 +5,7 @@
 	select SYS_FSL_DDR_BE
 	select SYS_FSL_MMDC
 	select SYS_FSL_ERRATUM_A010315
+	select ARCH_EARLY_INIT_R
 
 config ARCH_LS1043A
 	bool
@@ -22,6 +23,7 @@
 	select SYS_FSL_ERRATUM_A010539
 	select SYS_FSL_HAS_DDR3
 	select SYS_FSL_HAS_DDR4
+	select ARCH_EARLY_INIT_R
 
 config ARCH_LS1046A
 	bool
@@ -38,6 +40,7 @@
 	select SYS_FSL_ERRATUM_A010539
 	select SYS_FSL_HAS_DDR4
 	select SYS_FSL_SRDS_2
+	select ARCH_EARLY_INIT_R
 
 config ARCH_LS2080A
 	bool
@@ -62,6 +65,7 @@
 	select SYS_FSL_ERRATUM_A009803
 	select SYS_FSL_ERRATUM_A009942
 	select SYS_FSL_ERRATUM_A010165
+	select ARCH_EARLY_INIT_R
 
 config FSL_LSCH2
 	bool