fs/adfs: map: break up adfs_read_map()

Split up adfs_read_map() into separate helpers to layout the map,
read the map, and release the map buffers.

Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
1 file changed