evas/cpu: rework SIGILL code for non-x86 (and fix windows build)

evas/cpu: rework SIGILL code for non-x86 (and fix windows build)

Summary:
the previous patch which improved this code for x86 archs broke compiling
for non-x86 and, coincidentally, for windows builds on x86 due to some
unusual #ifdef blocks

this attempts to restore handling on non-x86 and adds additional #ifdefs for
functions which did not build on windows due to removed code

ref 6b1ab3cd9c7e19908690e9e913df7504cc8ae7c8

Reviewers: ManMower, devilhorns

Reviewed By: ManMower

Subscribers: cedric, #committers

Tags: #efl

Maniphest Tasks: T7062

Differential Revision: https://phab.enlightenment.org/D6368