V4L/DVB (3400): Remove duplicated keymaps and add keymap for KWorld LTV883IR.

- Remove duplicated keymaps and add keymap for KWorld LTV883IR.
Thanks to Jon Ferguson <jon@sd-6.org>.

Signed-off-by: Nickolay V. Shmyrev <nshmyrev@yandex.ru>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
5 files changed