x86, mwait: Move mwait constants to a common header file

x86, mwait: Move mwait constants to a common header file

commit bc83cccc761953f878088cdfa682de0970b5561f upstream.

We have MWAIT constants spread across three different .c files, for no
good reason.  Move them all into a common header file.

[PG: required for cherry pick of ce5f68246b - to avoid dup. mwait
fields in smpboot.c; drop intel_idle.c chunk, as 34 doesnt have it]

Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
Reviewed-by: Arjan van de Ven <arjan@linux.intel.com>
Cc: Len Brown <lenb@kernel.org>
LKML-Reference: <tip-*@git.kernel.org>
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>