Add a data structure to represent the reference TSC MSR similar to
other MSRs. This simplifies the code for updating the MSR.
Signed-off-by: NAnirudh Rayabharam <anrayabh@linux.microsoft.com>
Reviewed-by: NMichael Kelley <mikelley@microsoft.com>
Link: https://lore.kernel.org/r/20221027095729.1676394-2-anrayabh@linux.microsoft.comSigned-off-by: NWei Liu <wei.liu@kernel.org>