configs: Add sam9x60ek_qspiflash_defconfig

Boot from QSPI nor flash.

The at91bootstrap, u-boot, u-boot env redundant, u-boot env,
device tree and kernel will reside in the QSPI nor flash.
The rootfs will reside in the NAND flash.

Signed-off-by: Tudor Ambarus <tudor.ambarus@microchip.com>
diff --git a/board/atmel/sam9x60ek/MAINTAINERS b/board/atmel/sam9x60ek/MAINTAINERS
index ec5bed7..d209249 100644
--- a/board/atmel/sam9x60ek/MAINTAINERS
+++ b/board/atmel/sam9x60ek/MAINTAINERS
@@ -6,3 +6,4 @@
 F:	include/configs/sam9x60ek.h
 F:	configs/sam9x60ek_mmc_defconfig
 F:	configs/sam9x60ek_nandflash_defconfig
+F:	configs/sam9x60ek_qspiflash_defconfig