omap3: use device specific naming for mem_init

Use device specific naming for functions so as to not overlap
with common function names.

Signed-off-by: Maxim Uvarov <maxim.uvarov@linaro.org>
Reviewed-by: Tom Rini <trini@konsulko.com>
diff --git a/arch/arm/mach-omap2/omap3/emif4.c b/arch/arm/mach-omap2/omap3/emif4.c
index 7e5a281..4fbfb38 100644
--- a/arch/arm/mach-omap2/omap3/emif4.c
+++ b/arch/arm/mach-omap2/omap3/emif4.c
@@ -159,10 +159,10 @@
 }
 
 /*
- * mem_init() -
+ * omap3_mem_init() -
  *  - Initialize memory subsystem
  */
-void mem_init(void)
+void omap3_mem_init(void)
 {
 	do_emif4_init();
 }