arm64: dts: sc7180: add bus clock to mdp node for sc7180 target

Move the bus clock to mdp device node,in order
to facilitate bus band width scaling on sc7180
target.

The parent device MDSS will not vote for bus bw,
instead the vote will be triggered by mdp device
node. Since a minimum vote is required to turn
on bus clock, move the clock node to mdp device
from where the votes are requested.

This patch has dependency on the below series
https://patchwork.kernel.org/patch/11468783/Reviewed-by: Rob Clark <robdclark@chromium.org>
Signed-off-by: Krishna Manikandan <mkrishn@codeaurora.org>
Link: https://lore.kernel.org/r/1594899334-19772-2-git-send-email-kalyan_t@codeaurora.orgSigned-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>

arch/arm64/boot/dts/qcom/sc7180.dtsi

@@ -2800,10 +2800,9 @@ mdss: mdss@ae00000 {
 			power-domains = <&dispcc MDSS_GDSC>;
 
 			clocks = <&gcc GCC_DISP_AHB_CLK>,
-				 <&gcc GCC_DISP_HF_AXI_CLK>,
 				 <&dispcc DISP_CC_MDSS_AHB_CLK>,
 				 <&dispcc DISP_CC_MDSS_MDP_CLK>;
-			clock-names = "iface", "bus", "ahb", "core";
+			clock-names = "iface", "ahb", "core";
 
 			assigned-clocks = <&dispcc DISP_CC_MDSS_MDP_CLK>;
 			assigned-clock-rates = <300000000>;
@@ -2829,12 +2828,13 @@ mdp: mdp@ae01000 {
 				      <0 0x0aeb0000 0 0x2008>;
 				reg-names = "mdp", "vbif";
 
-				clocks = <&dispcc DISP_CC_MDSS_AHB_CLK>,
+				clocks = <&gcc GCC_DISP_HF_AXI_CLK>,
+					 <&dispcc DISP_CC_MDSS_AHB_CLK>,
 					 <&dispcc DISP_CC_MDSS_ROT_CLK>,
 					 <&dispcc DISP_CC_MDSS_MDP_LUT_CLK>,
 					 <&dispcc DISP_CC_MDSS_MDP_CLK>,
 					 <&dispcc DISP_CC_MDSS_VSYNC_CLK>;
-				clock-names = "iface", "rot", "lut", "core",
+				clock-names = "bus", "iface", "rot", "lut", "core",
 					      "vsync";
 				assigned-clocks = <&dispcc DISP_CC_MDSS_MDP_CLK>,
 						  <&dispcc DISP_CC_MDSS_VSYNC_CLK>,