V4L/DVB(6548a) Fix compilation for TDA8290

From: Mauro Carvalho Chehab <mchehab@infradead.org>

drivers/media/video/tda8290.c:27:21: error: tda827x.h: No such file or directory
drivers/media/video/tda8290.c:28:22: error: tda18271.h: No such file or directory
drivers/media/video/tda8290.c:52: error: field 'cfg' has incomplete type
drivers/media/video/tda8290.c: In function 'tda829x_find_tuner':
drivers/media/video/tda8290.c:590: error: implicit declaration of function 'tda18271_attach'
drivers/media/video/tda8290.c:598: error: implicit declaration of function 'tda827x_attach'

Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>