arch: x86: enable Zhaoxin KX7000 pinctrl and GPIO support

This driver was previously disabled due to a build failure and was addressed
by a Zhaoxin patch revision. Enable this feature.

Signed-off-by: Mingcong Bai <baimingcong@uniontech.com>

arch/x86/configs/deepin_x86_desktop_defconfig

@@ -2175,7 +2175,7 @@ CONFIG_PINCTRL_METEORLAKE=m
 CONFIG_PINCTRL_SUNRISEPOINT=m
 CONFIG_PINCTRL_TIGERLAKE=m
 CONFIG_PINCTRL_MERRIFIELD=m
-# CONFIG_PINCTRL_KX7000 is not set
+CONFIG_PINCTRL_KX7000=m
 CONFIG_GPIO_SYSFS=y
 CONFIG_GPIO_AMDPT=m
 CONFIG_GPIO_DWAPB=m