dt-bindings: pinctrl: update bindings for MT7986 SoC

Add wifi pins in the description and set 'maxItems' for groups and pins.
Reviewed-by: Sam Shih <sam.shih@mediatek.com>
Signed-off-by: Peter Chiu <chui-hao.chiu@mediatek.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20220912092440.21011-1-chui-hao.chiu@mediatek.comSigned-off-by: Linus Walleij <linus.walleij@linaro.org>

Documentation/devicetree/bindings/pinctrl/mediatek,mt7986-pinctrl.yaml

@@ -117,6 +117,10 @@ patternProperties:
           "i2s"             "audio"     62, 63, 64, 65
           "switch_int"      "eth"       66
           "mdc_mdio"        "eth"       67
+          "wf_2g"           "wifi"      74, 75, 76, 77, 78, 79, 80, 81, 82, 83
+          "wf_5g"           "wifi"      91, 92, 93, 94, 95, 96, 97, 98, 99, 100
+          "wf_dbdc"         "wifi"      74, 75, 76, 77, 78, 79, 80, 81, 82, 83,
+                                        84, 85
 
         $ref: "/schemas/pinctrl/pinmux-node.yaml"
         properties:
@@ -234,7 +238,9 @@ patternProperties:
             then:
               properties:
                 groups:
+                  items:
                     enum: [wf_2g, wf_5g, wf_dbdc]
+                  maxItems: 3
       '.*conf.*':
         type: object
         additionalProperties: false
@@ -248,6 +254,7 @@ patternProperties:
               An array of strings. Each string contains the name of a pin.
               There is no PIN 41 to PIN 65 above on mt7686b, you can only use
               those pins on mt7986a.
+            items:
               enum: [SYS_WATCHDOG, WF2G_LED, WF5G_LED, I2C_SCL, I2C_SDA, GPIO_0,
                      GPIO_1, GPIO_2, GPIO_3, GPIO_4, GPIO_5, GPIO_6, GPIO_7,
                      GPIO_8, GPIO_9, GPIO_10, GPIO_11, GPIO_12, GPIO_13, GPIO_14,
@@ -267,6 +274,7 @@ patternProperties:
                      WF1_TOP_CLK, WF1_TOP_DATA, WF1_HB1, WF1_HB2, WF1_HB3,
                      WF1_HB4, WF1_HB0, WF1_HB0_B, WF1_HB5, WF1_HB6, WF1_HB7,
                      WF1_HB8]
+            maxItems: 101
 
           bias-disable: true