Convert CONFIG_SDCARD et al to Kconfig

This converts the following to Kconfig:
   CONFIG_SDCARD
   CONFIG_SPIFLASH

Signed-off-by: Tom Rini <trini@konsulko.com>
diff --git a/configs/T1024RDB_SPIFLASH_defconfig b/configs/T1024RDB_SPIFLASH_defconfig
index 0df88ea..e8dc395 100644
--- a/configs/T1024RDB_SPIFLASH_defconfig
+++ b/configs/T1024RDB_SPIFLASH_defconfig
@@ -22,8 +22,8 @@
 CONFIG_FIT_VERBOSE=y
 CONFIG_OF_BOARD_SETUP=y
 CONFIG_OF_STDOUT_VIA_ALIAS=y
-CONFIG_SYS_EXTRA_OPTIONS="SPIFLASH"
 CONFIG_RAMBOOT_PBL=y
+CONFIG_SPIFLASH=y
 CONFIG_SYS_FSL_PBL_PBI="board/freescale/t102xrdb/t1024_pbi.cfg"
 CONFIG_SYS_FSL_PBL_RCW="board/freescale/t102xrdb/t1024_spi_rcw.cfg"
 CONFIG_BOOTDELAY=10