dt-bindings: pinctrl: qcom,ipq6018: add qpic_pad function

The IPQ6018 pinctrl driver supports qpic_pad and DTS already uses it:

  'qpic_pad' is not one of ['adsp_ext', 'alsp_int', 'atest_bbrx0', ...
Reviewed-by: Bjorn Andersson <andersson@kernel.org>
Reviewed-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20221016170035.35014-9-krzysztof.kozlowski@linaro.orgSigned-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>

Documentation/devicetree/bindings/pinctrl/qcom,ipq6018-pinctrl.yaml

@@ -92,9 +92,9 @@ patternProperties:
                 qdss_ctitrig_in_b0, qdss_ctitrig_in_b1, qdss_ctitrig_out_a0,
                 qdss_ctitrig_out_a1, qdss_ctitrig_out_b0, qdss_ctitrig_out_b1,
                 qdss_traceclk_a, qdss_traceclk_b, qdss_tracectl_a, qdss_tracectl_b,
-                qdss_tracedata_a, qdss_tracedata_b, reset_n, sd_card, sd_write,
-                sec_mi2s, smb_int, ssbi_wtr0, ssbi_wtr1, uim1, uim2, uim3,
-                uim_batt, wcss_bt, wcss_fm, wcss_wlan, webcam1_rst ]
+                qdss_tracedata_a, qdss_tracedata_b, qpic_pad, reset_n, sd_card,
+                sd_write, sec_mi2s, smb_int, ssbi_wtr0, ssbi_wtr1, uim1, uim2,
+                uim3, uim_batt, wcss_bt, wcss_fm, wcss_wlan, webcam1_rst ]
 
       drive-strength:
         enum: [2, 4, 6, 8, 10, 12, 14, 16]