dt-bindings: net: broadcom-bluetooth: Add conditional constraints

Add conditional constraint to make property "reset-gpios" available only
for compatible devices acually having the reset pin.

Make property "brcm,requires-autobaud-mode" depend on property
"shutdown-gpios" as the shutdown pin is required to enter autobaud mode.

I looked at all compatible devices and compiled the matrix below before
formulating the conditional constraint. This was a pure paper exercise and
no verification testing has been performed.

                                d
                                e
                                v h
                                i o
                                c s
                            s   e t
                            h   - -
                            u   w w       v
                            t r a a     v d
                            d e k k     b d
                            o s e e     a i
                            w e u u     t o
                            n t p p     - -
                            - - - -     s s
                            g g g g     u u
                            p p p p t   p p
                            i i i i x l p p
                            o o o o c p l l
                            s s s s o o y y
    ---------------------------------------
    brcm,bcm20702a1         X X X X X X X X
    brcm,bcm4329-bt         X X X X X X X X
    brcm,bcm4330-bt         X X X X X X X X
    brcm,bcm4334-bt         X - X X X X X X
    brcm,bcm43438-bt        X - X X X X X X
    brcm,bcm4345c5          X - X X X X X X
    brcm,bcm43540-bt        X - X X X X X X
    brcm,bcm4335a0          X - X X X X X X
    brcm,bcm4349-bt         X - X X X X X X
    infineon,cyw55572-bt    X - X X X X X X
Signed-off-by: Hakan Jansson <hakan.jansson@infineon.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>

Documentation/devicetree/bindings/net/broadcom-bluetooth.yaml

@@ -117,6 +117,22 @@ properties:
 required:
   - compatible
 
+dependencies:
+  brcm,requires-autobaud-mode: [ 'shutdown-gpios' ]
+
+if:
+  not:
+    properties:
+      compatible:
+        contains:
+          enum:
+            - brcm,bcm20702a1
+            - brcm,bcm4329-bt
+            - brcm,bcm4330-bt
+then:
+  properties:
+    reset-gpios: false
+
 additionalProperties: false
 
 examples: