drivers: remove extraneous includes of smp_lock.h

These were missed the last time I cleaned this up
globally, because of code moving around or new code
getting merged.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>

drivers/tty/vt/vt_ioctl.c

@@ -27,7 +27,6 @@
 #include <linux/console.h>
 #include <linux/consolemap.h>
 #include <linux/signal.h>
-#include <linux/smp_lock.h>
 #include <linux/timex.h>
 
 #include <asm/io.h>