ARM: multi_v7_defconfig: add GPMI NAND controller support

Add GPMI NAND controller support as required by some NXP i.MX6/7
based boards.

Signed-off-by: Stefan Agner <stefan@agner.ch>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>

arch/arm/configs/multi_v7_defconfig

@@ -209,6 +209,7 @@ CONFIG_MTD_NAND_DENALI_DT=y
 CONFIG_MTD_NAND_OMAP2=y
 CONFIG_MTD_NAND_OMAP_BCH=y
 CONFIG_MTD_NAND_ATMEL=y
+CONFIG_MTD_NAND_GPMI_NAND=y
 CONFIG_MTD_NAND_BRCMNAND=y
 CONFIG_MTD_NAND_VF610_NFC=y
 CONFIG_MTD_NAND_DAVINCI=y