V4L/DVB (4104): Default "yes", no. default y, yes.

The Kernel config programs expect 'default y' and don't understand
'default "yes"'.

Signed-off-by: Trent Piepho <xyzzy@speakeasy.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>