ARM: dts: qcom: sdx55: Add support for A7 PLL clock

On SDX55 there is a separate A7 PLL which is used to provide high
frequency clock to the Cortex A7 CPU via a MUX.
Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Link: https://lore.kernel.org/r/20210408170457.91409-2-manivannan.sadhasivam@linaro.orgSigned-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>

arch/arm/boot/dts/qcom-sdx55.dtsi

@@ -352,6 +352,14 @@ intc: interrupt-controller@17800000 {
 			      <0x17802000 0x1000>;
 		};
 
+		a7pll: clock@17808000 {
+			compatible = "qcom,sdx55-a7pll";
+			reg = <0x17808000 0x1000>;
+			clocks = <&rpmhcc RPMH_CXO_CLK>;
+			clock-names = "bi_tcxo";
+			#clock-cells = <0>;
+		};
+
 		watchdog@17817000 {
 			compatible = "qcom,apss-wdt-sdx55", "qcom,kpss-wdt";
 			reg = <0x17817000 0x1000>;