ARM: mach-imx: mach-imx6q: Fix sparse warnings

Fix the following sparse warnings:

arch/arm/mach-imx/mach-imx6q.c:60:6: warning: symbol 'imx6q_restart' was not declared. Should it be static?
arch/arm/mach-imx/mach-imx6q.c:223:24: warning: symbol 'imx6q_cpufreq_pdev' 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/mach-imx6q.c

@@ -73,7 +73,7 @@ static int imx6q_revision(void)
 	}
 }
 
-void imx6q_restart(char mode, const char *cmd)
+static void imx6q_restart(char mode, const char *cmd)
 {
 	struct device_node *np;
 	void __iomem *wdog_base;
@@ -256,7 +256,7 @@ static void __init imx6q_opp_init(struct device *cpu_dev)
 	of_node_put(np);
 }
 
-struct platform_device imx6q_cpufreq_pdev = {
+static struct platform_device imx6q_cpufreq_pdev = {
 	.name = "imx6q-cpufreq",
 };