When OF_CONTROL is enabled, MMC boot device should not be detected
automatically, it should be MMC1 fixedly only the status "enabled"
is available.
Add NAND Flash boot device as well.
Signed-off-by: Wenyou Yang <wenyou.yang@atmel.com>
 
 #if defined(CONFIG_SYS_USE_MMC)
        if (dev == ATMEL_SAMA5_BOOT_FROM_MCI) {
+#if defined(CONFIG_SPL_OF_CONTROL)
+               return BOOT_DEVICE_MMC1;
+#else
                if (off == 0)
                        return BOOT_DEVICE_MMC1;
                if (off == 1)
                        return BOOT_DEVICE_MMC2;
                printf("ERROR: MMC controller %i not present!\n", dev);
                hang();
+#endif
        }
 #endif
 
                return BOOT_DEVICE_SPI;
 #endif
 
+       if (dev == ATMEL_SAMA5_BOOT_FROM_SMC)
+               return BOOT_DEVICE_NAND;
+
        if (dev == ATMEL_SAMA5_BOOT_FROM_SAMBA)
                return BOOT_DEVICE_USB;