arm: mach-omap2: mux: fix buffer overrun

memcpy() copies 8 bytes too much (omap_mux_entry vs. omap_mux). Correct
by replacing memcpy() with struct assignment, which is safer.
Signed-off-by: Aaro Koskinen <aaro.koskinen@nokia.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>

arch/arm/mach-omap2/mux.c

@@ -893,7 +893,7 @@ static struct omap_mux * __init omap_mux_list_add(
 		return NULL;
 
 	m = &entry->mux;
-	memcpy(m, src, sizeof(struct omap_mux_entry));
+	entry->mux = *src;
 
 #ifdef CONFIG_OMAP_MUX
 	if (omap_mux_copy_names(src, m)) {