[JFFS2] Use .unlocked_ioctl

This changes the .ioctl to the .unlocked_ioctl version.

Signed-off-by: Stoyan Gaydarov <stoyboyker@gmail.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>

diff --cc fs/jffs2/dir.c
Simple merge

diff --cc fs/jffs2/file.c
Simple merge

diff --cc fs/jffs2/ioctl.c
Simple merge

diff --cc fs/jffs2/os-linux.h
Simple merge