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/am3517_evm_defconfig b/configs/am3517_evm_defconfig
index f6baee0..19e01dc 100644
--- a/configs/am3517_evm_defconfig
+++ b/configs/am3517_evm_defconfig
@@ -35,6 +35,8 @@
 CONFIG_SYS_NAND_SPL_KERNEL_OFFS=0x2a0000
 CONFIG_SPL_FALCON_BOOT_MMCSD=y
 CONFIG_SYS_MMCSD_RAW_MODE_KERNEL_SECTOR=0x1700
+CONFIG_SYS_MMCSD_RAW_MODE_ARGS_SECTOR=0x1500
+CONFIG_SYS_MMCSD_RAW_MODE_ARGS_SECTORS=0x200
 # CONFIG_SPL_POWER is not set
 CONFIG_SYS_PROMPT="AM3517_EVM # "
 CONFIG_SYS_MAXARGS=64