i386: arch/i386/kernel/i8253.c should #include <asm/timer.h>

Every file should include the headers containing the prototypes for its
global functions.
Signed-off-by: Adrian Bunk <bunk@stusta.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Andi Kleen <ak@suse.de>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

arch/i386/kernel/i8253.c

@@ -13,6 +13,7 @@
 #include <asm/delay.h>
 #include <asm/i8253.h>
 #include <asm/io.h>
+#include <asm/timer.h>
 
 #include "io_ports.h"