module_init() function should be marked __init.

[jkosina@suse.cz: remove overly verbose changelog]
Signed-off-by: NMinfei Huang <mnfhuang@gmail.com>
Acked-by: NJosh Poimboeuf <jpoimboe@redhat.com>
Signed-off-by: NJiri Kosina <jkosina@suse.cz>