clk: qcom: Use ARRAY_SIZE in gpucc-sc7180 for parent clocks

It's nicer to use ARRAY_SIZE instead of hardcoding.  Had we always
been doing this it would have prevented a previous bug.  See commit
74c31ff9 ("clk: qcom: gpu_cc_gmu_clk_src has 5 parents, not 6").
Signed-off-by: Douglas Anderson <dianders@chromium.org>
Link: https://lkml.kernel.org/r/20200203103049.v4.10.I3bf44e33f4dc7ecca10a50dbccb7dc082894fa59@changeidSigned-off-by: Stephen Boyd <sboyd@kernel.org>

drivers/clk/qcom/gpucc-sc7180.c

@@ -84,7 +84,7 @@ static struct clk_rcg2 gpu_cc_gmu_clk_src = {
 	.clkr.hw.init = &(struct clk_init_data){
 		.name = "gpu_cc_gmu_clk_src",
 		.parent_data = gpu_cc_parent_data_0,
-		.num_parents = 4,
+		.num_parents = ARRAY_SIZE(gpu_cc_parent_data_0),
 		.flags = CLK_SET_RATE_PARENT,
 		.ops = &clk_rcg2_shared_ops,
 	},