rockchip: remove SYS_MMCSD_RAW_MODE_U_BOOT_SECTOR from defconfig

Use default value 0x4000 for SYS_MMCSD_RAW_MODE_U_BOOT_SECTOR instead
of define a new one.

Signed-off-by: Kever Yang <kever.yang@rock-chips.com>
Acked-by: Philipp Tomsich <philipp.tomsich@theobroma-systems.com>
Reviewed-by: Philipp Tomsich <philipp.tomsich@theobroma-systems.com>

configs/evb-rk3399_defconfig

@@ -12,7 +12,6 @@ CONFIG_SPL_LOAD_FIT=y
 # CONFIG_DISPLAY_CPUINFO is not set
 CONFIG_SPL_STACK_R=y
 CONFIG_SPL_STACK_R_MALLOC_SIMPLE_LEN=0x4000
-CONFIG_SYS_MMCSD_RAW_MODE_U_BOOT_SECTOR=0x200
 CONFIG_CMD_BOOTZ=y
 CONFIG_CMD_GPT=y
 CONFIG_CMD_MMC=y

configs/firefly-rk3399_defconfig

@@ -12,7 +12,6 @@ CONFIG_SPL_LOAD_FIT=y
 # CONFIG_DISPLAY_CPUINFO is not set
 CONFIG_SPL_STACK_R=y
 CONFIG_SPL_STACK_R_MALLOC_SIMPLE_LEN=0x4000
-CONFIG_SYS_MMCSD_RAW_MODE_U_BOOT_SECTOR=0x200
 CONFIG_SPL_ATF_SUPPORT=y
 CONFIG_SPL_ATF_TEXT_BASE=0x00010000
 CONFIG_CMD_BOOTZ=y