ARM: mach-imx: mm-imx3: Staticize imx3_init_l2x0()

Fix the following sparse warning:

arch/arm/mach-imx/mm-imx3.c:85:13: warning: symbol 'imx3_init_l2x0' 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>
diff --git a/arch/arm/mach-imx/mm-imx3.c b/arch/arm/mach-imx/mm-imx3.c
index cefa047..e0e69a6 100644
--- a/arch/arm/mach-imx/mm-imx3.c
+++ b/arch/arm/mach-imx/mm-imx3.c
@@ -82,7 +82,7 @@
 	return __arm_ioremap_caller(phys_addr, size, mtype, caller);
 }
 
-void __init imx3_init_l2x0(void)
+static void __init imx3_init_l2x0(void)
 {
 #ifdef CONFIG_CACHE_L2X0
 	void __iomem *l2x0_base;