bcm968380gerg: enable gpio support

Enable the gpio support (driver and command)
in the configuration of the board bcm968380gerg
Signed-off-by: NPhilippe Reynes <philippe.reynes@softathome.com>

configs/bcm968380gerg_ram_defconfig

@@ -24,6 +24,7 @@ CONFIG_CMD_LICENSE=y
 # CONFIG_CMD_CRC32 is not set
 CONFIG_CMD_MEMINFO=y
 # CONFIG_CMD_FLASH is not set
+CONFIG_CMD_GPIO=y
 # CONFIG_CMD_LOADS is not set
 # CONFIG_CMD_MISC is not set
 CONFIG_DEFAULT_DEVICE_TREE="brcm,bcm968380gerg"
@@ -31,6 +32,7 @@ CONFIG_DEFAULT_DEVICE_TREE="brcm,bcm968380gerg"
 # CONFIG_DM_DEVICE_REMOVE is not set
 CONFIG_HAVE_BLOCK_DEVICE=y
 CONFIG_DM_GPIO=y
+CONFIG_BCM6345_GPIO=y
 CONFIG_LED=y
 CONFIG_LED_BCM6328=y
 CONFIG_LED_BLINK=y