Convert CONFIG_FSL_DDR_BIST et al to Kconfig

This converts the following to Kconfig:
   CONFIG_FSL_DDR_BIST
   CONFIG_FSL_DDR_INTERACTIVE

Signed-off-by: Tom Rini <trini@konsulko.com>
diff --git a/arch/arm/cpu/armv8/fsl-layerscape/Kconfig b/arch/arm/cpu/armv8/fsl-layerscape/Kconfig
index 1a057f7..a6ac897 100644
--- a/arch/arm/cpu/armv8/fsl-layerscape/Kconfig
+++ b/arch/arm/cpu/armv8/fsl-layerscape/Kconfig
@@ -233,6 +233,8 @@
 config ARCH_LX2162A
 	bool
 	select ARMV8_SET_SMPEN
+	select FSL_DDR_BIST
+	select FSL_DDR_INTERACTIVE
 	select FSL_LAYERSCAPE
 	select FSL_LSCH3
 	select GICV3
@@ -267,6 +269,8 @@
 config ARCH_LX2160A
 	bool
 	select ARMV8_SET_SMPEN
+	select FSL_DDR_BIST
+	select FSL_DDR_INTERACTIVE
 	select FSL_LAYERSCAPE
 	select FSL_LSCH3
 	select GICV3