wait_for_completion_timeout return 0 (timeout) or >=1 (completion) so the check
for > 0 in the else branch is always true and can be dropped. The comment seems
misleading as it is always going to pass the result up.
The sync of the completion access with __i2400m_dev_reset_handle (which checks
for if (i2400m->reset_ctx) could race if i2400m_reset() returns negative so
the resetting of i2400m->reset_ctx == NULL is moved to the out: path.
As wait_for_completion_timeout returns unsigned long not int, an appropriately
named variable of type unsigned long is added and assignments fixed up.
Signed-off-by: Nicholas Mc Guire <hofrat@xxxxxxxxx>