dt-bindings: pinctrl: stm32: Use properties from pincfg-node.yaml

Don't re-declare the standard pincfg properties; take them from
the default schema.

Signed-off-by: Antonio Borneo <antonio.borneo@foss.st.com>
Acked-by: Conor Dooley <conor.dooley@microchip.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

Author: AntonioBorneo

Documentation/devicetree/bindings/pinctrl/st,stm32-pinctrl.yaml

@@ -151,6 +151,8 @@ patternProperties:
           pinctrl group available on the machine. Each subnode will list the
           pins it needs, and how they should be configured, with regard to muxer
           configuration, pullups, drive, output high/low and output speed.
+        $ref: /schemas/pinctrl/pincfg-node.yaml
+
         properties:
           pinmux:
             $ref: /schemas/types.yaml#/definitions/uint32-array
@@ -195,35 +197,28 @@ patternProperties:
                           pinmux = <STM32_PINMUX('A', 9, RSVD)>;
                };
 
-          bias-disable:
-            type: boolean
+          bias-disable: true
 
-          bias-pull-down:
-            type: boolean
+          bias-pull-down: true
 
-          bias-pull-up:
-            type: boolean
+          bias-pull-up: true
 
-          drive-push-pull:
-            type: boolean
+          drive-push-pull: true
 
-          drive-open-drain:
-            type: boolean
+          drive-open-drain: true
 
-          output-low:
-            type: boolean
+          output-low: true
 
-          output-high:
-            type: boolean
+          output-high: true
 
           slew-rate:
             description: |
               0: Low speed
               1: Medium speed
               2: Fast speed
               3: High speed
-            $ref: /schemas/types.yaml#/definitions/uint32
-            enum: [0, 1, 2, 3]
+            minimum: 0
+            maximum: 3
 
         required:
           - pinmux