JFS: allow extended attributes to be set within a existing transaction

Signed-off-by: Dave Kleikamp <shaggy@austin.ibm.com>

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

diff --cc fs/jfs/jfs_acl.h
Simple merge

diff --cc fs/jfs/jfs_xattr.h
Simple merge

diff --cc fs/jfs/namei.c
Simple merge

diff --cc fs/jfs/xattr.c
Simple merge