arm64: defconfig: update RK8XX MFD config

Update the defconfig for the new RK8XX MFD config name,
which got split to add SPI support.
Reported-by: Marek Szyprowski <m.szyprowski@samsung.com>
Fixes: c20e8c5b ("mfd: rk808: Split into core and i2c")
Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>

arch/arm64/configs/defconfig

@@ -693,7 +693,8 @@ CONFIG_MFD_MAX77620=y
 CONFIG_MFD_MT6360=y
 CONFIG_MFD_MT6397=y
 CONFIG_MFD_SPMI_PMIC=y
-CONFIG_MFD_RK808=y
+CONFIG_MFD_RK8XX_I2C=y
+CONFIG_MFD_RK8XX_SPI=y
 CONFIG_MFD_SEC_CORE=y
 CONFIG_MFD_SL28CPLD=y
 CONFIG_RZ_MTU3=y