[JFFS2] Fix ACL vs. mode handling.

When POSIX ACL support was enabled, we weren't writing correct
legacy modes to the medium on inode creation, or when the ACL was set.
This meant that the permissions would be incorrect after the file system
was remounted.

Signed-off-by: David Woodhouse <dwmw2@infradead.org>

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

diff --cc fs/jffs2/acl.h
Simple merge

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

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

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