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/drivers/amd/agesa/bootblock.c

@@ -5,7 +5,6 @@
 #include <amdblocks/amd_pci_mmconf.h>
 #include <amdblocks/biosram.h>
 #include <arch/bootblock.h>
-#include <cpu/amd/msr.h>
 #include <cpu/x86/mtrr.h>
 #include <cpu/x86/lapic.h>