dt-bindings: mfd: max77620: Convert to DT schema

Convert max77620 Device Tree bindings from TXT to YAML format. This patch
does not change any functionality; the bindings remain the same. The
thermal bindings are incorporated into the binding. GPIO controller
function in MAX77620 has no dedicated node and is folded into the parent
node itself.

Signed-off-by: Svyatoslav Ryhel <clamor95@gmail.com>
Acked-by: Daniel Lezcano <daniel.lezcano@kernel.org>
Reviewed-by: Rob Herring (Arm) <robh@kernel.org>
Link: https://patch.msgid.link/20260312085258.11431-4-clamor95@gmail.com
Signed-off-by: Lee Jones <lee@kernel.org>

Author: clamor-s

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

@@ -27,7 +27,6 @@ properties:
           - gateworks,pld-gpio
           - ibm,ppc4xx-gpio
           - loongson,ls1x-gpio
-          - maxim,max77620
           - nintendo,hollywood-gpio
           - nxp,pca9570
           - nxp,pca9571
@@ -86,7 +85,6 @@ allOf:
         compatible:
           contains:
             enum:
-              - maxim,max77620
               - rockchip,rk3328-grf-gpio
               - ti,lp3943-gpio
               - ti,palmas-gpio