mount can generally figure out the filesystem type from the superblock;
otherwise, /proc/filesystems is a more correct fallback than
/etc/filesystems and presumably always available.
(From OE-Core rev: 4199676383ce50b81c05a4d2b2610c9cdb49342e)
Signed-off-by: Jonas Bonn <jonas@norrbonn.se>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>