dt-bindings: rtc: add olpc,xo1-rtc to trivial-rtc

Add the OLPC XO-1 RTC compatible string to the trivial-rtc schema
instead of creating a standalone binding file, as it only requires
a compatible property with no additional configuration.

Signed-off-by: Anushka Badhe <anushkabadhe@gmail.com>
Acked-by: Conor Dooley <conor.dooley@microchip.com>
Link: https://patch.msgid.link/20260325093003.44051-1-anushkabadhe@gmail.com
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>

Author: Anushka Badhe

Documentation/devicetree/bindings/rtc/olpc-xo1-rtc.txt

@@ -65,6 +65,8 @@ properties:
       - microcrystal,rv3029
       # Real Time Clock
       - microcrystal,rv8523
+      # OLPC XO-1 RTC
+      - olpc,xo1-rtc
       # I2C bus SERIAL INTERFACE REAL-TIME CLOCK IC
       - ricoh,r2025sd
       # I2C bus SERIAL INTERFACE REAL-TIME CLOCK IC