linux-yocto/4.4: fix PAT for 32bit x86
Integrating the following mainline destined commits to fix PAT issues with
32bit x86 and qemu:
bc22b90fb583 x86/pat: Document the PAT initialization sequence
c534b1ec1991 x86/xen, pat: Remove PAT table init code from Xen
cd47692e804f x86/mtrr: Fix PAT init handling when MTRR is disabled
039434bdc165 x86/mtrr: Fix Xorg crashes in Qemu sessions
c08196e8064c x86/mm/pat: Replace cpu_has_pat with boot_cpu_has()
6928fce8c766 x86/mm/pat: Add pat_disable() interface
3163c8d5468d x86/mm/pat: Add support of non-default PAT MSR setting
With this change applied, we once again have working graphics and no special
work arounds.
Signed-off-by: Bruce Ashfield <bruce.ashfield@windriver.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
