GeniaTech T220 DVB-T2 support fix

This is the patch CrazyCat created to fix DVB-T2 handling for GeniaTech T220 / August T210 devices. It is needed as long as the patches https://patchwork.linuxtv.org/patch/24152/ and https://patchwork.linuxtv.org/patch/24153/ are not part of the kernel.