mfd: rk808: Split into core and i2c

Split rk808 into a core and an i2c part in preparation for
SPI support.

Acked-by: Alexandre Belloni <alexandre.belloni@bootlin.com> # for RTC
Tested-by: Diederik de Haas <didi.debian@cknow.org> # Rock64, Quartz64 Model A + B
Tested-by: Vincent Legoll <vincent.legoll@gmail.com> # Pine64 QuartzPro64
Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>
Link: https://lore.kernel.org/r/20230504173618.142075-6-sebastian.reichel@collabora.com
Signed-off-by: Lee Jones <lee@kernel.org>
diff --git a/drivers/mfd/Makefile b/drivers/mfd/Makefile
index 1d2392f..ba37319 100644
--- a/drivers/mfd/Makefile
+++ b/drivers/mfd/Makefile
@@ -214,7 +214,8 @@
 obj-$(CONFIG_MFD_VIPERBOARD)    += viperboard.o
 obj-$(CONFIG_MFD_NTXEC)		+= ntxec.o
 obj-$(CONFIG_MFD_RC5T583)	+= rc5t583.o rc5t583-irq.o
-obj-$(CONFIG_MFD_RK808)		+= rk808.o
+obj-$(CONFIG_MFD_RK8XX)		+= rk8xx-core.o
+obj-$(CONFIG_MFD_RK8XX_I2C)	+= rk8xx-i2c.o
 obj-$(CONFIG_MFD_RN5T618)	+= rn5t618.o
 obj-$(CONFIG_MFD_SEC_CORE)	+= sec-core.o sec-irq.o
 obj-$(CONFIG_MFD_SYSCON)	+= syscon.o