fuse: clean up annotations of fc->lock

Makes the existing annotations match the more common one per line style
and adds a few missing annotations.

Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com>
Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>

diff --cc fs/fuse/dev.c
Simple merge

diff --cc fs/fuse/file.c
Simple merge