ARM: dts: qcom: apq8064: Convert adreno from legacy gpu-pwrlevels to opp-v2

APQ8064 was last user of gpu-pwrlevels inside mainline tree, so convert
it now.

Tested on Nexus 7 2013, no functional changes.
Signed-off-by: David Heidelberg <david@ixit.cz>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Link: https://lore.kernel.org/r/20210829133918.57780-3-david@ixit.cz

arch/arm/boot/dts/qcom-apq8064.dtsi

@@ -1230,13 +1230,17 @@ &gfx3d1 29
 				  &gfx3d1 30
 				  &gfx3d1 31>;
 
-			qcom,gpu-pwrlevels {
-				compatible = "qcom,gpu-pwrlevels";
-				qcom,gpu-pwrlevel@0 {
-					qcom,gpu-freq = <450000000>;
+			operating-points-v2 = <&gpu_opp_table>;
+
+			gpu_opp_table: opp-table {
+				compatible = "operating-points-v2";
+
+				opp-320000000 {
+					opp-hz = /bits/ 64 <450000000>;
 				};
-				qcom,gpu-pwrlevel@1 {
-					qcom,gpu-freq = <27000000>;
+
+				opp-27000000 {
+					opp-hz = /bits/ 64 <27000000>;
 				};
 			};
 		};