arm64: dts: sdm845: Set 'bi_tcxo' as ref clock of the DSI PHYs

Add 'bi_tcxo' as ref clock for the DSI PHYs, it was previously
hardcoded in the PLL 'driver' for the 10nm PHY.
Signed-off-by: Matthias Kaehlcke <mka@chromium.org>
Reviewed-by: Douglas Anderson <dianders@chromium.org>
Reviewed-by: Stephen Boyd <swboyd@chromium.org>
Signed-off-by: Andy Gross <agross@kernel.org>

arch/arm64/boot/dts/qcom/sdm845.dtsi

@@ -1985,8 +1985,9 @@ dsi0_phy: dsi-phy@ae94400 {
 				#clock-cells = <1>;
 				#phy-cells = <0>;
 
-				clocks = <&dispcc DISP_CC_MDSS_AHB_CLK>;
-				clock-names = "iface";
+				clocks = <&dispcc DISP_CC_MDSS_AHB_CLK>,
+					 <&rpmhcc RPMH_CXO_CLK>;
+				clock-names = "iface", "ref";
 
 				status = "disabled";
 			};
@@ -2051,8 +2052,9 @@ dsi1_phy: dsi-phy@ae96400 {
 				#clock-cells = <1>;
 				#phy-cells = <0>;
 
-				clocks = <&dispcc DISP_CC_MDSS_AHB_CLK>;
-				clock-names = "iface";
+				clocks = <&dispcc DISP_CC_MDSS_AHB_CLK>,
+					 <&rpmhcc RPMH_CXO_CLK>;
+				clock-names = "iface", "ref";
 
 				status = "disabled";
 			};