rtc: pcf8523: Add rv8523 compatible

The Microcrystal RV-8523 is compatible with the PCF8523.
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>

Documentation/devicetree/bindings/rtc/rtc.txt

@@ -49,6 +49,7 @@ isil,isl1208		Intersil ISL1208 Low Power RTC with Battery Backed SRAM
 isil,isl1218		Intersil ISL1218 Low Power RTC with Battery Backed SRAM
 isil,isl12022		Intersil ISL12022 Real-time Clock
 microcrystal,rv3029	Real Time Clock Module with I2C-Bus
+microcrystal,rv8523	Real Time Clock
 nxp,pcf2127		Real-time clock
 nxp,pcf2129		Real-time clock
 nxp,pcf8523		Real-time Clock

drivers/rtc/rtc-pcf8523.c

@@ -374,6 +374,7 @@ MODULE_DEVICE_TABLE(i2c, pcf8523_id);
 #ifdef CONFIG_OF
 static const struct of_device_id pcf8523_of_match[] = {
 	{ .compatible = "nxp,pcf8523" },
+	{ .compatible = "microcrystal,rv8523" },
 	{ }
 };
 MODULE_DEVICE_TABLE(of, pcf8523_of_match);