arm: mvebu: helios4: Enable mvebu GPIO

Make use of U-Boot's GPIO DM to control native GPIO and I2C IO expander.
Signed-off-by: NAditya Prayoga <aditya@kobol.io>
Reviewed-by: NStefan Roese <sr@denx.de>
Tested-By: NDennis Gilmore <dgilmore@redhat.com>
Reviewed-By: NDennis Gilmore <dgilmore@redhat.com>
Signed-off-by: NStefan Roese <sr@denx.de>

configs/helios4_defconfig

@@ -22,6 +22,7 @@ CONFIG_DISPLAY_BOARDINFO_LATE=y
 CONFIG_SYS_MMCSD_RAW_MODE_U_BOOT_SECTOR=0x141
 CONFIG_SPL_I2C_SUPPORT=y
 # CONFIG_CMD_FLASH is not set
+CONFIG_CMD_GPIO=y
 CONFIG_CMD_I2C=y
 CONFIG_CMD_MMC=y
 CONFIG_CMD_PCI=y
@@ -38,6 +39,8 @@ CONFIG_ENV_IS_IN_MMC=y
 CONFIG_NET_RANDOM_ETHADDR=y
 CONFIG_SPL_OF_TRANSLATE=y
 CONFIG_SCSI_AHCI=y
+CONFIG_DM_GPIO=y
+CONFIG_MVEBU_GPIO=y
 CONFIG_DM_PCA953X=y
 CONFIG_DM_I2C=y
 CONFIG_SYS_I2C_MVTWSI=y