V4L/DVB (6221): budget-ci: select TT keymap for DVB-S TT 1500

DVB-S TT 1500 must use the TT keymap.

Signed-off-by: Oliver Endriss <o.endriss@gmx.de>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>