Convert CONFIG_SPL_MPC8XXX_INIT_DDR_SUPPORT to Kconfig

This converts the following to Kconfig:
   CONFIG_SPL_MPC8XXX_INIT_DDR_SUPPORT

Signed-off-by: Tom Rini <trini@konsulko.com>
diff --git a/configs/ls1021aiot_sdcard_defconfig b/configs/ls1021aiot_sdcard_defconfig
index 3a26cb0..b4f8431 100644
--- a/configs/ls1021aiot_sdcard_defconfig
+++ b/configs/ls1021aiot_sdcard_defconfig
@@ -20,6 +20,7 @@
 CONFIG_SPL_FSL_PBL=y
 CONFIG_SYS_MMCSD_RAW_MODE_U_BOOT_USE_SECTOR=y
 CONFIG_SYS_MMCSD_RAW_MODE_U_BOOT_SECTOR=0xe8
+CONFIG_SPL_MPC8XXX_INIT_DDR_SUPPORT=y
 CONFIG_CMD_BOOTZ=y
 CONFIG_CMD_GREPENV=y
 CONFIG_SYS_I2C_EEPROM_ADDR_LEN=2
diff --git a/configs/ls1046aqds_nand_defconfig b/configs/ls1046aqds_nand_defconfig
index 93c0fcf..9913637 100644
--- a/configs/ls1046aqds_nand_defconfig
+++ b/configs/ls1046aqds_nand_defconfig
@@ -32,6 +32,7 @@
 CONFIG_SPL_BOARD_INIT=y
 CONFIG_SYS_MMCSD_RAW_MODE_U_BOOT_USE_SECTOR=y
 CONFIG_SYS_MMCSD_RAW_MODE_U_BOOT_SECTOR=0x110
+CONFIG_SPL_MPC8XXX_INIT_DDR_SUPPORT=y
 CONFIG_CMD_BOOTZ=y
 CONFIG_CMD_IMLS=y
 CONFIG_CMD_GREPENV=y
diff --git a/include/configs/ls1021aiot.h b/include/configs/ls1021aiot.h
index b88c16f..e2a70d2 100644
--- a/include/configs/ls1021aiot.h
+++ b/include/configs/ls1021aiot.h
@@ -63,7 +63,6 @@
 #define CONFIG_SPL_LIBCOMMON_SUPPORT
 #define CONFIG_SPL_LIBGENERIC_SUPPORT
 #define CONFIG_SPL_ENV_SUPPORT
-#define CONFIG_SPL_MPC8XXX_INIT_DDR_SUPPORT
 #define CONFIG_SPL_I2C
 #define CONFIG_SPL_WATCHDOG
 #define CONFIG_SPL_MMC_SUPPORT
diff --git a/include/configs/ls1046a_common.h b/include/configs/ls1046a_common.h
index 55b1f89..72422ea 100644
--- a/include/configs/ls1046a_common.h
+++ b/include/configs/ls1046a_common.h
@@ -107,7 +107,6 @@
 #define CONFIG_SPL_ENV_SUPPORT
 #define CONFIG_SPL_WATCHDOG
 #define CONFIG_SPL_I2C
-#define CONFIG_SPL_MPC8XXX_INIT_DDR_SUPPORT
 
 #define CONFIG_SPL_NAND_SUPPORT
 #define CONFIG_SPL_DRIVERS_MISC