MIPS: BCM47XX: Increase NVRAM buffer size to 64 KiB

For years Broadcom devices use 64 KiB NVRAM partition size and some of
them indeed have it filled in more than 50%. This change allows reading
whole NVRAM e.g. on Netgear WNDR4500 and Netgear R8000.
Signed-off-by: NRafał Miłecki <zajec5@gmail.com>
Cc: linux-mips@linux-mips.org
Cc: Hauke Mehrtens <hauke@hauke-m.de>
Patchwork: https://patchwork.linux-mips.org/patch/9651/Signed-off-by: NRalf Baechle <ralf@linux-mips.org>

arch/mips/bcm47xx/nvram.c

@@ -20,7 +20,7 @@
 #include <linux/bcm47xx_nvram.h>
 
 #define NVRAM_MAGIC			0x48534C46	/* 'FLSH' */
-#define NVRAM_SPACE			0x8000
+#define NVRAM_SPACE			0x10000
 #define NVRAM_MAX_GPIO_ENTRIES		32
 #define NVRAM_MAX_GPIO_VALUE_LEN	30