Convert CONFIG_SYS_MMCSD_RAW_MODE_ARGS_SECTOR et al to Kconfig

This converts the following to Kconfig:
   CONFIG_SYS_MMCSD_RAW_MODE_ARGS_SECTOR
   CONFIG_SYS_MMCSD_RAW_MODE_ARGS_SECTORS

Signed-off-by: Tom Rini <trini@konsulko.com>
diff --git a/configs/devkit8000_defconfig b/configs/devkit8000_defconfig
index f8a9853..4e144a9 100644
--- a/configs/devkit8000_defconfig
+++ b/configs/devkit8000_defconfig
@@ -26,6 +26,8 @@
 CONFIG_SYS_NAND_SPL_KERNEL_OFFS=0x280000
 CONFIG_SPL_FALCON_BOOT_MMCSD=y
 CONFIG_SYS_MMCSD_RAW_MODE_KERNEL_SECTOR=0x500
+CONFIG_SYS_MMCSD_RAW_MODE_ARGS_SECTOR=0x8
+CONFIG_SYS_MMCSD_RAW_MODE_ARGS_SECTORS=8
 CONFIG_SYS_MAXARGS=64
 # CONFIG_CMD_IMI is not set
 CONFIG_CMD_SPL=y