hfsplus: rework functionality of getting, setting and deleting of extended attributes

Rework functionality of getting, setting and deleting of extended attributes.

Signed-off-by: Vyacheslav Dubeyko <slava@dubeyko.com>
Reported-by: Hin-Tak Leung <htl10@users.sourceforge.net>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Jan Kara <jack@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

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

diff --cc fs/hfsplus/xattr.h
Simple merge

diff --cc fs/hfsplus/xattr_security.c
Simple merge

diff --cc fs/hfsplus/xattr_trusted.c
Simple merge

diff --cc fs/hfsplus/xattr_user.c
Simple merge