V4L/DVB: add missing 'p' at card name 'Hauppauge HD PVR'

I don't know if there are applications which rely on this name,
but after all it's a spelling mistake.

Signed-off-by: Lars Hanisch <dvb@cinnamon-sage.de>
CC: Janne Granau <j@jannau.net>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>