video: bochs: Drop inclusion of <asm/mtrr.h>

The driver does not call any MTRR APIs.

Signed-off-by: Bin Meng <bmeng@tinylab.org>
Reviewed-by: Simon Glass <sjg@chromium.org>
Tested-by: Simon Glass <sjg@chromium.org>  # qemu-x86_64
diff --git a/drivers/video/bochs.c b/drivers/video/bochs.c
index 2136b51..fa0283c 100644
--- a/drivers/video/bochs.c
+++ b/drivers/video/bochs.c
@@ -11,7 +11,6 @@
 #include <pci.h>
 #include <video.h>
 #include <asm/io.h>
-#include <asm/mtrr.h>
 #include <linux/sizes.h>
 #include "bochs.h"