Be more strict when when resolving devices and allow hfs too.
On OS X HFS is a valid filesystem on an Ipod. When resolving device node to
mountpoints and vice versa also check mounts of hfs partitions. This results in
trying to install the bootloader on a MacPod to show the (intended) MacPod
warning instead of failing with a "could not open ipod" error because no valid
device node could be retrieved. Also, be more strict on matching to prevent
problems with one name being a subset of another.
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@24802 a1c6a512-1295-4272-9138-f99709370657