realtek: rtl930x: enable rtl8231-related drivers

Enable the following drivers to use the external RTL8231 GPIO expander.

- aux-mdio
- rtl8231 (mfd)
- rtl8231 (pinctrl)

Signed-off-by: INAGAKI Hiroshi <musashino.open@gmail.com>
Link: https://github.com/openwrt/openwrt/pull/17593


Signed-off-by: Sander Vanheule <sander@svanheule.net>

target/linux/realtek/rtl930x/config-6.6

@@ -105,6 +105,7 @@ CONFIG_IRQ_MIPS_CPU=y
 CONFIG_IRQ_WORK=y
 CONFIG_JFFS2_ZLIB=y
 CONFIG_LEDS_GPIO=y
+# CONFIG_LEDS_RTL8231 is not set
 CONFIG_LIBFDT=y
 CONFIG_LOCK_DEBUGGING_SUPPORT=y
 CONFIG_MACH_REALTEK_RTL=y
@@ -113,9 +114,9 @@ CONFIG_MDIO_BUS=y
 CONFIG_MDIO_DEVICE=y
 CONFIG_MDIO_DEVRES=y
 CONFIG_MDIO_I2C=y
-# CONFIG_MDIO_REALTEK_OTTO_AUX is not set
+CONFIG_MDIO_REALTEK_OTTO_AUX=y
 CONFIG_MDIO_SMBUS=y
-# CONFIG_MFD_RTL8231 is not set
+CONFIG_MFD_RTL8231=y
 CONFIG_MFD_SYSCON=y
 CONFIG_MIGRATION=y
 CONFIG_MIPS=y
@@ -176,6 +177,7 @@ CONFIG_PHYLIB=y
 CONFIG_PHYLIB_LEDS=y
 CONFIG_PHYLINK=y
 CONFIG_PINCTRL=y
+CONFIG_PINCTRL_RTL8231=y
 CONFIG_POWER_RESET=y
 CONFIG_POWER_RESET_GPIO_RESTART=y
 CONFIG_POWER_RESET_SYSCON=y
@@ -189,6 +191,7 @@ CONFIG_REALTEK_PHY=y
 CONFIG_REALTEK_SOC_PHY=y
 CONFIG_REGMAP=y
 CONFIG_REGMAP_I2C=y
+CONFIG_REGMAP_MDIO=y
 CONFIG_REGMAP_MMIO=y
 CONFIG_RESET_CONTROLLER=y
 # CONFIG_RTL838X is not set