MIPS: Ci20: Enable GPIO driver

Update the Ci20's defconfig to enable the JZ4780's GPIO driver.
Signed-off-by: Harvey Hunt <harvey.hunt@imgtec.com>
Cc: linux-mips@linux-mips.org
Cc: linux-kernel@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/16751/Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

arch/mips/configs/ci20_defconfig

@@ -91,6 +91,7 @@ CONFIG_SERIAL_OF_PLATFORM=y
 CONFIG_I2C=y
 CONFIG_I2C_JZ4780=y
 CONFIG_GPIO_SYSFS=y
+CONFIG_GPIO_INGENIC=y
 # CONFIG_HWMON is not set
 CONFIG_REGULATOR=y
 CONFIG_REGULATOR_DEBUG=y