arm64: dts: qcom: msm8916: add xo clocks to rpmcc and a53pll

Both a53pll and rpmcc make use of xo as a clock parent. Add it to the
respective device nodes.
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Reviewed-by: Stephan Gerhold <stephan@gerhold.net>
Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Link: https://lore.kernel.org/r/20220620010519.1533364-1-dmitry.baryshkov@linaro.org

arch/arm64/boot/dts/qcom/msm8916.dtsi

@@ -301,6 +301,8 @@ rpm_requests: rpm-requests {
 				rpmcc: clock-controller {
 					compatible = "qcom,rpmcc-msm8916", "qcom,rpmcc";
 					#clock-cells = <1>;
+					clocks = <&xo_board>;
+					clock-names = "xo";
 				};
 
 				rpmpd: power-controller {
@@ -1858,6 +1860,8 @@ a53pll: clock@b016000 {
 			compatible = "qcom,msm8916-a53pll";
 			reg = <0x0b016000 0x40>;
 			#clock-cells = <0>;
+			clocks = <&xo_board>;
+			clock-names = "xo";
 		};
 
 		timer@b020000 {