bcm963158: enable gpio support

Enable the gpio support (driver and command)
in the configuration of the board bcm963158.
Signed-off-by: NPhilippe Reynes <philippe.reynes@softathome.com>

configs/bcm963158_ram_defconfig

@@ -20,6 +20,7 @@ CONFIG_CMD_BOOTEFI_SELFTEST=y
 # CONFIG_CMD_LZMADEC is not set
 # CONFIG_CMD_UNZIP is not set
 # CONFIG_CMD_FLASH is not set
+CONFIG_CMD_GPIO=y
 CONFIG_CMD_CACHE=y
 CONFIG_DOS_PARTITION=y
 CONFIG_ISO_PARTITION=y
@@ -28,6 +29,8 @@ CONFIG_DEFAULT_DEVICE_TREE="bcm963158"
 # CONFIG_NET is not set
 CONFIG_BLK=y
 CONFIG_CLK=y
+CONFIG_DM_GPIO=y
+CONFIG_BCM6345_GPIO=y
 # CONFIG_MMC is not set
 CONFIG_SPECIFY_CONSOLE_INDEX=y
 # CONFIG_SPL_SERIAL_PRESENT is not set