arm64: rockchip_linux_defconfig: add the missing RK8xx configigure

This patch enables the gpio and powerkey configure for Rockchip RK8xx
PMIC.

Change-Id: I09b5469f0263e00e9c467afea0f3a639c4eef105
Signed-off-by: Caesar Wang <wxt@rock-chips.com>

Author: Caesar-github

arch/arm64/configs/rockchip_linux_defconfig

@@ -208,6 +208,7 @@ CONFIG_TOUCHSCREEN_GT1X=y
 CONFIG_ROCKCHIP_REMOTECTL=y
 CONFIG_ROCKCHIP_REMOTECTL_PWM=y
 CONFIG_INPUT_MISC=y
+CONFIG_INPUT_RK8XX_PWRKEY=y
 CONFIG_INPUT_UINPUT=y
 CONFIG_INPUT_GPIO=y
 # CONFIG_SERIO is not set
@@ -235,6 +236,7 @@ CONFIG_SPI_SPIDEV=y
 CONFIG_DEBUG_GPIO=y
 CONFIG_GPIO_SYSFS=y
 CONFIG_GPIO_GENERIC_PLATFORM=y
+CONFIG_GPIO_RK8XX=y
 CONFIG_BATTERY_SBS=y
 CONFIG_CHARGER_GPIO=y
 CONFIG_CHARGER_BQ24735=y