dt-bindings:trivial-devices: Add pli1209bc

Add trivial device entry for PLI1209BC Digital Supervisor from Vicor
Corporation.
Signed-off-by: Marcello Sylvester Bauer <sylv@sylv.io>
Acked-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/15a9fcfb5b9592c6d87f12c2a4c77fd069f5cfff.1645435888.git.sylv@sylv.ioSigned-off-by: Guenter Roeck <linux@roeck-us.net>

Documentation/devicetree/bindings/trivial-devices.yaml

@@ -354,6 +354,8 @@ properties:
           - ti,tps544c25
             # Winbond/Nuvoton H/W Monitor
           - winbond,w83793
+            # Vicor Corporation Digital Supervisor
+          - vicor,pli1209bc
             # i2c trusted platform module (TPM)
           - winbond,wpct301