ARM: multi_v7_defconfig: fix config typo

s/CONFIG_CONFIG_BCM47XX_NVRAM/CONFIG_BCM47XX_NVRAM/

Fixes: 8dace3040426 ("ARM: multi_v7_defconfig: Enable BCM47xx/BCM5301x drivers")
Signed-off-by: Valentin Rothberg <valentinrothberg@gmail.com>
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>

arch/arm/configs/multi_v7_defconfig

@@ -893,7 +893,7 @@ CONFIG_BCM2835_MBOX=y
 CONFIG_RASPBERRYPI_FIRMWARE=y
 CONFIG_EFI_VARS=m
 CONFIG_EFI_CAPSULE_LOADER=m
-CONFIG_CONFIG_BCM47XX_NVRAM=y
+CONFIG_BCM47XX_NVRAM=y
 CONFIG_BCM47XX_SPROM=y
 CONFIG_EXT4_FS=y
 CONFIG_AUTOFS4_FS=y