[media] keycodes for DSR-0112 remote bundled with Haupauge MiniStick

Add kycodes for DSR-0112 remote that comes together with
Haupauge MiniStick
  http://lirc.sourceforge.net/remotes/hauppauge/DSR-0112.jpg



[mchehab@redhat.com: Fix KEY_PREVIOUS to match the definition for the other model]
Signed-off-by: Richard Zidlicky <rz@linux-m68k.org>
Acked-by: Jarod Wilson <jarod@redhat.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>