clk: mvebu: Staticize of_cpu_clk_setup

'of_cpu_clk_setup' is used only in this file. Make it static.
Signed-off-by: NSachin Kamat <sachin.kamat@linaro.org>
Acked-by: NGregory CLEMENT <gregory.clement@free-electrons.com>
Signed-off-by: NMike Turquette <mturquette@linaro.org>

drivers/clk/mvebu/clk-cpu.c

@@ -101,7 +101,7 @@ static const struct clk_ops cpu_ops = {
 	.set_rate = clk_cpu_set_rate,
 };
 
-void __init of_cpu_clk_setup(struct device_node *node)
+static void __init of_cpu_clk_setup(struct device_node *node)
 {
 	struct cpu_clk *cpuclk;
 	void __iomem *clock_complex_base = of_iomap(node, 0);