arch/m68k/bvme6000/rtc.c: remove duplicated include

Removed duplicated include file <linux/smp_lock.h> in
arch/m68k/bvme6000/rtc.c.
Signed-off-by: Huang Weiyi <weiyi.huang@gmail.com>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

arch/m68k/bvme6000/rtc.c

@@ -18,7 +18,6 @@
 #include <linux/poll.h>
 #include <linux/module.h>
 #include <linux/mc146818rtc.h>	/* For struct rtc_time and ioctls, etc */
-#include <linux/smp_lock.h>
 #include <linux/bcd.h>
 #include <asm/bvme6000hw.h>