at91: Switch to SD_BOOT / CONFIG_NAND_BOOT

The values CONFIG_SYS_USE_NANDFLASH and CONFIG_SYS_USE_MMC serve the
same purpose as CONFIG_SD_BOOT / CONFIG_NAND_BOOT so migrate to using
these switches instead as they're already in Kconfig.

Cc: Stelian Pop <stelian@popies.net>
Cc: Heiko Schocher <hs@denx.de>
Cc: Daniel Gorsulowski <daniel.gorsulowski@esd.eu>
Cc: Eugen Hristev <eugen.hristev@microchip.com>
Signed-off-by: Tom Rini <trini@konsulko.com>
diff --git a/configs/smartweb_defconfig b/configs/smartweb_defconfig
index 6ff8988..0f96ada 100644
--- a/configs/smartweb_defconfig
+++ b/configs/smartweb_defconfig
@@ -24,6 +24,7 @@
 CONFIG_ENV_OFFSET_REDUND=0x180000
 CONFIG_SYS_LOAD_ADDR=0x22000000
 CONFIG_FIT=y
+CONFIG_NAND_BOOT=y
 CONFIG_BOOTDELAY=3
 CONFIG_AUTOBOOT_KEYED=y
 CONFIG_AUTOBOOT_PROMPT="Autobooting in %d seconds, press \"<Esc><Esc>\" to stop\n"
@@ -65,7 +66,6 @@
 CONFIG_AT91_GPIO=y
 # CONFIG_MMC is not set
 CONFIG_MTD=y
-CONFIG_MTD_RAW_NAND=y
 # CONFIG_SYS_NAND_USE_FLASH_BBT is not set
 CONFIG_NAND_ATMEL=y
 CONFIG_SYS_NAND_BLOCK_SIZE=0x20000