DT: i2c: Add more devices handled by the rtc-rs5c372 driver

This allows checkpatch to validate more DTSes.
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>

Documentation/devicetree/bindings/i2c/trivial-devices.txt

@@ -74,7 +74,12 @@ ovti,ov5642		OV5642: Color CMOS QSXGA (5-megapixel) Image Sensor with OmniBSI an
 pericom,pt7c4338	Real-time Clock Module
 plx,pex8648		48-Lane, 12-Port PCI Express Gen 2 (5.0 GT/s) Switch
 ramtron,24c64		i2c serial eeprom  (24cxx)
+ricoh,r2025sd		I2C bus SERIAL INTERFACE REAL-TIME CLOCK IC
+ricoh,r2221tl		I2C bus SERIAL INTERFACE REAL-TIME CLOCK IC
 ricoh,rs5c372a		I2C bus SERIAL INTERFACE REAL-TIME CLOCK IC
+ricoh,rs5c372b		I2C bus SERIAL INTERFACE REAL-TIME CLOCK IC
+ricoh,rv5c386		I2C bus SERIAL INTERFACE REAL-TIME CLOCK IC
+ricoh,rv5c387a		I2C bus SERIAL INTERFACE REAL-TIME CLOCK IC
 samsung,24ad0xd1	S524AD0XF1 (128K/256K-bit Serial EEPROM for Low Power)
 sii,s35390a		2-wire CMOS real-time clock
 st-micro,24c256		i2c serial eeprom  (24cxx)