src: Remove unneeded include <pc80/keyboard.h>

Change-Id: I0dcdfb1fa782c7936a19de11adcf17387f49d9db
Signed-off-by: Elyes HAOUAS <ehaouas@noos.fr>
Reviewed-on: https://review.coreboot.org/29309
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Marshall Dawson <marshalldawson3rd@gmail.com>

src/northbridge/intel/i440bx/northbridge.c

@@ -21,7 +21,6 @@
 #include <string.h>
 #include <cbmem.h>
 #include <cpu/cpu.h>
-#include <pc80/keyboard.h>
 #include "northbridge.h"
 #include "i440bx.h"