hfsplus: remove superflous rootflags field in hfsplus_inode_info

The rootflags field in hfsplus_inode_info only caches the immutable and
append-only flags in the VFS inode, so we can easily get rid of it.

Signed-off-by: Christoph Hellwig <hch@tuxera.com>

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

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

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

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