drivers/char/nvram.c: Removed duplicated include

Removed duplicated include file <linux/smp_lock.h> in
drivers/char/nvram.c.
Signed-off-by: Huang Weiyi <weiyi.huang@gmail.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

drivers/char/nvram.c

@@ -107,7 +107,6 @@
 #include <linux/init.h>
 #include <linux/proc_fs.h>
 #include <linux/spinlock.h>
-#include <linux/smp_lock.h>
 
 #include <asm/io.h>
 #include <asm/uaccess.h>