clk: mvebu: Use of_clk_get_parent_name()

This reverts commit e79b202c632f24f49f2eb9459b88b5fd9e332263.

Now that we use of_clk_get() inside of_clk_get_parent_name() we
can safely use it here.

Signed-off-by: Stephen Boyd <[e-mail]>

drivers/clk/mvebu/clk-cpu.c

···
 	for_each_node_by_type(dn, "cpu") {
 		struct clk_init_data init;
 		struct clk *clk;
-		struct clk *parent_clk;
 		char *clk_name = kzalloc(5, GFP_KERNEL);
 		int cpu, err;
 
···
 			goto bail_out;
 
 		sprintf(clk_name, "cpu%d", cpu);
-		parent_clk = of_clk_get(node, 0);
 
-		cpuclk[cpu].parent_name = __clk_get_name(parent_clk);
+		cpuclk[cpu].parent_name = of_clk_get_parent_name(node, 0);
 		cpuclk[cpu].clk_name = clk_name;
 		cpuclk[cpu].cpu = cpu;
 		cpuclk[cpu].reg_base = clock_complex_base;