Add `hwinfo_get_reset_cause` and `hwinfo_clear_reset_cause` to retrieve
and to clear cause of system reset on supported platforms.
Different platforms can provide different causes of reset, however
there is a great deal of overlap. `enum reset_cause` can be expanded in
the future to support additional reasons, as additional platforms are
supported.
Signed-off-by: Arvin Farahmand <arvinf@ip-logix.com>
98a0ccd5c5