hm2: add missing case for 5i24 support

Signed-off-by: Michael Geszkiewicz <micges@wp.pl>
doc: add 5i24 to list of supported boards in hm2_pci manpage and to MODULE_DESCRIPTION text

Signed-off-by: Michael Geszkiewicz <micges@wp.pl>
Merge remote-tracking branch 'origin/2.6'