dt-bindings: rtc: Fix Xicor X1205 vendor prefix

The vendor for the Xircom X1205 RTC is not Xircom, but Xicor which was
acquired by Intersil.

Signed-off-by: Rob Herring (Arm) <robh@kernel.org>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Link: https://lore.kernel.org/r/20250821215703.869628-1-robh@kernel.org
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>

Author: robherring

Documentation/devicetree/bindings/rtc/trivial-rtc.yaml

@@ -85,8 +85,8 @@ properties:
       - via,vt8500-rtc
       # I2C bus SERIAL INTERFACE REAL-TIME CLOCK IC
       - whwave,sd3078
-      # Xircom X1205 I2C RTC
-      - xircom,x1205
+      # Xicor/Intersil X1205 I2C RTC
+      - xicor,x1205
 
   reg:
     maxItems: 1