davinci: omapl138_lcdk: add u-boot sector for mmc/sd boot

Set the correct CONFIG_SYS_MMCSD_RAW_MODE_U_BOOT_SECTOR value in order
to be able to boot from MMC/SD.

The SPL is stored at sector 0x75, while u-boot will follow at
sector 0xb5.

Signed-off-by: Fabien Parent <fparent@baylibre.com>
Reviewed-by: Tom Rini <trini@konsulko.com>

configs/omapl138_lcdk_defconfig

@@ -9,6 +9,7 @@ CONFIG_VERSION_VARIABLE=y
 # CONFIG_DISPLAY_CPUINFO is not set
 # CONFIG_DISPLAY_BOARDINFO is not set
 CONFIG_SPL=y
+CONFIG_SYS_MMCSD_RAW_MODE_U_BOOT_SECTOR=0xb5
 CONFIG_HUSH_PARSER=y
 CONFIG_SYS_PROMPT="U-Boot > "
 # CONFIG_CMD_IMLS is not set