Fix the following coccinelle reports:

drivers/media/i2c/tda1997x.c:911:6-21:
WARNING: Assignment of 0/1 to bool variable

drivers/media/i2c/tda1997x.c:939:2-17:
WARNING: Assignment of 0/1 to bool variable

drivers/media/i2c/tda1997x.c:947:4-19:
WARNING: Assignment of 0/1 to bool variable

Replace assignment to 1 with true and assignment to 0 with false.

Found using - Coccinelle (http://coccinelle.lip6.fr)
Signed-off-by: Daniel W. S. Almeida <dwlsalmeida@gmail.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>