V4L/DVB (6788): tda8290: fix codingstyle, open brace following struct on the same line

Fix codingstyle issue discovered after using new checkpatch.pl

 ERROR: open brace '{' following struct go on the same line
 396: FILE: linux/drivers/media/video/tda8290.h:24:
+struct tda829x_config
+{

Signed-off-by: Michael Krufky <mkrufky@linuxtv.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>