[media] si2157: Add get_if_frequency callback

This is needed for PCTV 522e support.

Signed-off-by: Matthias Schwarzott <zzam@gentoo.org>
Signed-off-by: Antti Palosaari <crope@iki.fi>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>
1 file changed