ARM: uniphier: enable GPIO command and driver for UniPhier SoCs

This allows to use the "gpio" command.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Acked-by: Simon Glass <sjg@chromium.org>
diff --git a/configs/uniphier_pro4_defconfig b/configs/uniphier_pro4_defconfig
index 2361db6..3c2f7b0 100644
--- a/configs/uniphier_pro4_defconfig
+++ b/configs/uniphier_pro4_defconfig
@@ -12,12 +12,14 @@
 CONFIG_CMD_I2C=y
 CONFIG_CMD_USB=y
 # CONFIG_CMD_FPGA is not set
+CONFIG_CMD_GPIO=y
 CONFIG_CMD_TFTPPUT=y
 CONFIG_CMD_PING=y
 CONFIG_CMD_TIME=y
 # CONFIG_CMD_MISC is not set
 CONFIG_NET_RANDOM_ETHADDR=y
 CONFIG_SPL_SIMPLE_BUS=y
+CONFIG_GPIO_UNIPHIER=y
 CONFIG_NAND_DENALI=y
 CONFIG_SYS_NAND_DENALI_64BIT=y
 CONFIG_NAND_DENALI_SPARE_AREA_SKIP_BYTES=8