ARM: mach-imx: clk-pllv2: Staticize clk_pllv2_ops

Fix the following sparse warning:

rch/arm/mach-imx/clk-pllv2.c:232:16: warning: symbol 'clk_pllv2_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-pllv2.c

@@ -229,7 +229,7 @@ static void clk_pllv2_unprepare(struct clk_hw *hw)
 	__raw_writel(reg, pllbase + MXC_PLL_DP_CTL);
 }
 
-struct clk_ops clk_pllv2_ops = {
+static struct clk_ops clk_pllv2_ops = {
 	.prepare = clk_pllv2_prepare,
 	.unprepare = clk_pllv2_unprepare,
 	.recalc_rate = clk_pllv2_recalc_rate,