Add the pstate_msr union of a bitfield struct and a raw uint64_t to
allow easier access of the bitfields of the P state MSRs which will be
used in future patches to generate the P state ACPI packages for the CPU
objects. BKDG #55072 Rev 3.04 was used as a reference.
Signed-off-by: Felix Held <felix-coreboot@felixheld.de>
Change-Id: I944c8598ba95a0333124655c61ef9eba8a7595c9
Reviewed-on: https://review.coreboot.org/c/coreboot/+/73998
Reviewed-by: Matt DeVillier <matt.devillier@amd.corp-partner.google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>