media: mgb4: Fix switched CMT frequency range "magic values" sets

The reason why this passed unnoticed is that most infotainment systems
use frequencies near enough the middle (50MHz) where both sets work.

Fixes: 0ab13674 ("media: pci: mgb4: Added Digiteq Automotive MGB4 driver")
Cc: stable@vger.kernel.org
Signed-off-by: Martin Tůma <martin.tuma@digiteqautomotive.com>
Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>