ARM: mach-imx: clk-pllv1: Staticize clk_pllv1_ops

Fix the following sparse warning:

arch/arm/mach-imx/clk-pllv1.c:81:16: warning: symbol 'clk_pllv1_ops' was not declared. Should it be static?
Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>

arch/arm/mach-imx/clk-pllv1.c

@@ -78,7 +78,7 @@ static unsigned long clk_pllv1_recalc_rate(struct clk_hw *hw,
 	return ll;
 }
 
-struct clk_ops clk_pllv1_ops = {
+static struct clk_ops clk_pllv1_ops = {
 	.recalc_rate = clk_pllv1_recalc_rate,
 };