libpayload: Remove unnecessary include of arch/msr.h

The functions defined in that header aren't used anywhere in the actual code,
and that include breaks things on ARM.

Built for ARM with COREBOOT_VIDEO_CONSOLE turned on and saw compiler
errors go away.

Change-Id: I56d6fe5e00c8fccda6e31ef8752326bd36398e74
Signed-off-by: Gabe Black <gabeblack@google.com>
Reviewed-on: http://review.coreboot.org/2656
Tested-by: build bot (Jenkins)
Reviewed-by: Patrick Georgi <patrick@georgi-clan.de>
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>

payloads/libpayload/drivers/video/corebootfb.c

@@ -32,7 +32,6 @@
 #include <coreboot_tables.h>
 #include <pci.h>
 #include <video_console.h>
-#include <arch/msr.h>
 #include "font8x16.h"
 
 struct video_console coreboot_video_console;