mfd: rt5120: Add Richtek PMIC support

Add Richtek RT5120 PMIC I2C driver.

Signed-off-by: ChiYuan Huang <cy_huang@richtek.com>
Signed-off-by: Lee Jones <lee@kernel.org>
Link: https://lore.kernel.org/r/1660100142-32493-3-git-send-email-u0084500@gmail.com
diff --git a/drivers/mfd/Makefile b/drivers/mfd/Makefile
index bcfb8d3..7ed3ef4 100644
--- a/drivers/mfd/Makefile
+++ b/drivers/mfd/Makefile
@@ -242,6 +242,7 @@
 obj-$(CONFIG_MFD_DLN2)		+= dln2.o
 obj-$(CONFIG_MFD_RT4831)	+= rt4831.o
 obj-$(CONFIG_MFD_RT5033)	+= rt5033.o
+obj-$(CONFIG_MFD_RT5120)	+= rt5120.o
 obj-$(CONFIG_MFD_SKY81452)	+= sky81452.o
 
 obj-$(CONFIG_INTEL_SOC_PMIC)		+= intel_soc_pmic_crc.o