bcm53xx: fix bcma gpio chip base

Signed-off-by: Felix Fietkau <nbd@openwrt.org>

SVN-Revision: 45399

target/linux/bcm53xx/patches-3.18/180-bcma_set_gpio_base.patch

+Subject: [PATCH] bcma: set gpio chip->base for CONFIG_ARCH_BCM_5301X like on 47xx
+
+Signed-off-by: Felix Fietkau <nbd@openwrt.org>
+---
+--- a/drivers/bcma/driver_gpio.c
++++ b/drivers/bcma/driver_gpio.c
+@@ -240,7 +240,7 @@ int bcma_gpio_init(struct bcma_drv_cc *c
+ 	 * relative (per chip) numbers.
+ 	 * So let's use predictable base for BCM47XX and "random" for all other.
+ 	 */
+-#if IS_BUILTIN(CONFIG_BCM47XX)
++#if IS_BUILTIN(CONFIG_BCM47XX) || IS_BUILTIN(CONFIG_ARCH_BCM_5301X)
+ 	chip->base		= bus->num * BCMA_GPIO_MAX_PINS;
+ #else
+ 	chip->base		= -1;