APM: take over maintainership
Commit 04a6553f076 ("apm: orphan the driver") Orphaned the APM
driver as Stephen is not willing/able to maintain it any more.
As I still have some hardware that is using APM and running 2.6,
I can take it over.
Signed-off-by: Jiri Kosina <jkosina@suse.cz>