arm: mvebu: turris_omnia: add GPIO support to defconfig

Add support for the gpio command and driver for the I2C connected
pca9538 controller, to be able to determine if SFP module is present in
the Turris Omnia router.

Signed-off-by: Marek BehĂșn <marek.behun@nic.cz>
Reviewed-by: Stefan Roese <sr@denx.de>
Signed-off-by: Stefan Roese <sr@denx.de>
diff --git a/configs/turris_omnia_defconfig b/configs/turris_omnia_defconfig
index 93763c4..6caa1a9 100644
--- a/configs/turris_omnia_defconfig
+++ b/configs/turris_omnia_defconfig
@@ -24,6 +24,7 @@
 CONFIG_SPL_I2C_SUPPORT=y
 CONFIG_SPL_SPI_LOAD=y
 # CONFIG_CMD_FLASH is not set
+CONFIG_CMD_GPIO=y
 CONFIG_CMD_I2C=y
 CONFIG_CMD_MMC=y
 CONFIG_CMD_PCI=y
@@ -48,6 +49,10 @@
 CONFIG_SATA=y
 CONFIG_SCSI=y
 CONFIG_SCSI_AHCI=y
+CONFIG_SPL_GPIO_SUPPORT=y
+CONFIG_DM_GPIO=y
+# CONFIG_MVEBU_GPIO is not set
+CONFIG_DM_PCA953X=y
 CONFIG_DM_MMC=y
 CONFIG_MMC_SDHCI=y
 CONFIG_MMC_SDHCI_MV=y