Change in flashrom[master]: hwaccess: fix build on non-x86 targets

[Peter Marheine (Code Review)]

Attention is currently required from: Nico Huber, Paul Menzel, Peter Marheine.
Hello build bot (Jenkins), Thomas Heijligen, Edward O'Callaghan,

I'd like you to reexamine a change. Please visit

https://review.coreboot.org/c/flashrom/+/61194

to look at the new patch set (#5).

Change subject: hwaccess: fix build on non-x86 targets
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hwaccess: fix build on non-x86 targets

The changes to hwaccess in commit 49d758698a0dd166679c48b1a2785e50e9b0cc83
cause build failure on non-x86 systems because the hwaccess_x86_*
headers are included in some files that are built for all platforms
(particularly those in the internal programmer) and those headers in
turn include <sys/io.h> which only exists on x86.

This change makes the hwaccess_x86 headers a nop on non-x86 platforms so
the internal programmer can be built without errors.

The comment on the stub implementation of rget_io_perms() is also
modified to remove references to non-x86 platforms, since that file is
only built on x86 now.

BUG=None
TEST=meson build succeeds for both x86 and ARM targets

Signed-off-by: Peter Marheine 
Change-Id: I20f122679c30340b2c73afd7419e79644ddc3c4e
---
M hwaccess_x86_io.c
M hwaccess_x86_io.h
M hwaccess_x86_msr.h
M internal.c
4 files changed, 14 insertions(+), 7 deletions(-)

git pull ssh://review.coreboot.org:29418/flashrom refs/changes/94/61194/5