dt-bindings: pinctrl: qcom,sdx55: fix matching pin config

The TLMM pin controller follows generic pin-controller bindings, so
should have subnodes with '-state' and '-pins'.  Otherwise the subnodes
(level one and two) are not properly matched.

  qcom-sdx55-telit-fn980-tlb.dtb: pinctrl@f100000: 'pcie_ep_clkreq_default', 'pcie_ep_perst_default', 'pcie_ep_wake_default' do not match any of the regexes: '-pins$', 'pinctrl-[0-9]+'

This method also unifies the bindings with other Qualcomm TLMM and LPASS
pinctrl bindings.

Reviewed-by: Bjorn Andersson <andersson@kernel.org>
Reviewed-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20221016170035.35014-29-krzysztof.kozlowski@linaro.org
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>

Documentation/devicetree/bindings/pinctrl/qcom,sdx55-pinctrl.yaml

@@ -45,9 +45,17 @@ properties:
   gpio-reserved-ranges:
     maxItems: 1
 
-#PIN CONFIGURATION NODES
 patternProperties:
-  '-pins$':
+  "-state$":
+    oneOf:
+      - $ref: "#/$defs/qcom-sdx55-tlmm-state"
+      - patternProperties:
+          "-pins$":
+            $ref: "#/$defs/qcom-sdx55-tlmm-state"
+        additionalProperties: false
+
+$defs:
+  qcom-sdx55-tlmm-state:
     type: object
     description:
       Pinctrl node's client devices use subnodes for desired pin configuration.
@@ -146,7 +154,7 @@ examples:
                 #interrupt-cells = <2>;
                 interrupts = <GIC_SPI 212 IRQ_TYPE_LEVEL_HIGH>;
 
-                serial-pins {
+                serial-state {
                         pins = "gpio8", "gpio9";
                         function = "blsp_uart3";
                         drive-strength = <8>;