ARM: at91/defconfig: refresh at91sam9260_9g20_defconfig

Select CONFIG_EMBEDDED as it it useful for that board.

Also select CONFIG_MTD_UBI to really enable UBIfs (CONFIG_FS_UBIFS depends on
it).
Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>

arch/arm/configs/at91sam9260_9g20_defconfig

@@ -3,6 +3,7 @@
 CONFIG_SYSVIPC=y
 CONFIG_LOG_BUF_SHIFT=14
 CONFIG_BLK_DEV_INITRD=y
+CONFIG_EMBEDDED=y
 CONFIG_SLAB=y
 CONFIG_MODULES=y
 CONFIG_MODULE_UNLOAD=y
@@ -58,6 +59,7 @@ CONFIG_MTD_BLOCK=y
 CONFIG_MTD_DATAFLASH=y
 CONFIG_MTD_NAND=y
 CONFIG_MTD_NAND_ATMEL=y
+CONFIG_MTD_UBI=y
 CONFIG_BLK_DEV_LOOP=y
 CONFIG_BLK_DEV_RAM=y
 CONFIG_BLK_DEV_RAM_SIZE=8192