dt-bindings: rtc: Add EM Microelectronic EM3027 bindings

Document the bindings for the EM Microelectronic EM3027 RTC.
Signed-off-by: Thierry Reding <treding@nvidia.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20220617114420.1398259-2-thierry.reding@gmail.com

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

@@ -30,6 +30,8 @@ properties:
       - dallas,ds1672
       # Extremely Accurate I²C RTC with Integrated Crystal and SRAM
       - dallas,ds3232
+      # EM Microelectronic EM3027 RTC
+      - emmicro,em3027
       # I2C-BUS INTERFACE REAL TIME CLOCK MODULE
       - epson,rx8010
       # I2C-BUS INTERFACE REAL TIME CLOCK MODULE