m68k/bootinfo: Use kmemdup rather than duplicating its implementation

The patch was generated using fixed coccinelle semantic patch
scripts/coccinelle/api/memdup.cocci [1].

[1]: http://permalink.gmane.org/gmane.linux.kernel/2014320

Signed-off-by: Andrzej Hajda <a.hajda@samsung.com>
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>

arch/m68k/kernel/bootinfo_proc.c

@@ -62,12 +62,10 @@ static int __init init_bootinfo_procfs(void)
 	if (!bootinfo_size)
 		return -EINVAL;
 
-	bootinfo_copy = kmalloc(bootinfo_size, GFP_KERNEL);
+	bootinfo_copy = kmemdup(bootinfo_tmp, bootinfo_size, GFP_KERNEL);
 	if (!bootinfo_copy)
 		return -ENOMEM;
 
-	memcpy(bootinfo_copy, bootinfo_tmp, bootinfo_size);
-
 	pde = proc_create_data("bootinfo", 0400, NULL, &bootinfo_fops, NULL);
 	if (!pde) {
 		kfree(bootinfo_copy);