arm64: dts: qcom: msm8998-xperia: Add audio clock and its pin

All smartphones of this platform are equipped with a WCD9335 audio
codec, getting its MCLK from PM8998 gpio13: add this clock to DT.
Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@somainline.org>
Reviewed-by: Marijn Suijten <marijn.suijten@somainline.org>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Link: https://lore.kernel.org/r/20210909123733.367248-7-angelogioacchino.delregno@somainline.org

arch/arm64/boot/dts/qcom/msm8998-sony-xperia-yoshino.dtsi

@@ -20,6 +20,19 @@ / {
 	qcom,msm-id = <0x124 0x20000>, <0x124 0x20001>; /* 8998v2, v2.1 */
 	qcom,board-id = <8 0>;
 
+	clocks {
+		compatible = "simple-bus";
+
+		div1_mclk: divclk1 {
+			compatible = "gpio-gate-clock";
+			pinctrl-0 = <&audio_mclk_pin>;
+			pinctrl-names = "default";
+			clocks = <&rpmcc RPM_SMD_DIV_CLK1>;
+			#clock-cells = <0>;
+			enable-gpios = <&pm8998_gpio 13 GPIO_ACTIVE_HIGH>;
+		};
+	};
+
 	board_vbat: vbat-regulator {
 		compatible = "regulator-fixed";
 		regulator-name = "VBAT";
@@ -307,6 +320,12 @@ cam_snapshot_pin_a: cam-snapshot-btn-active {
 		input-enable;
 		qcom,drive-strength = <PMIC_GPIO_STRENGTH_NO>;
 	};
+
+	audio_mclk_pin: audio-mclk-pin-active {
+		pins = "gpio13";
+		function = "func2";
+		power-source = <0>;
+	};
 };
 
 &pmi8998_gpio {