treewide: Remove unused <cpu/amd/msr.h>

Change-Id: Id24a7c7db24f49672df9d5ceefec5b7596f23e09
Signed-off-by: Elyes Haouas <ehaouas@noos.fr>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/64939
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Felix Held <felix-coreboot@felixheld.de>

src/cpu/amd/pi/00730F01/fixme.c

@@ -1,7 +1,6 @@
 /* SPDX-License-Identifier: GPL-2.0-only */
 
 #include <arch/hpet.h>
-#include <cpu/amd/msr.h>
 #include <cpu/amd/mtrr.h>
 #include <northbridge/amd/agesa/agesa_helper.h>
 #include <Porting.h>