Revert "net: Enhance Axxia FEMAC Error Reset"

This reverts commit 7ef6948a.

revert this patch temporarily since this patch will cause
a calltrace, this Reset function only called when the ethernet
run with some unknown error, according test, the MAC can recover
to work without reset PHY, so revert this to avoid import new
issue.

Signed-off-by: Liwei Song <liwei.song@windriver.com>
Signed-off-by: Bruce Ashfield <bruce.ashfield@gmail.com>