[media] cxd2820r: Update frontend capabilities to advertise QAM-256
[media] cxd2820r: Update frontend capabilities to advertise QAM-256

This is supported in DVB-T2 mode, so added to the T/T2 frontend.

Signed-off-by: Steve Kerrison <9ce5770b3bb4b2a1d59be2d97e34379cd192299f@stevekerrison.com>
Acked-by: Antti Palosaari <293134fe763ce2d9d8609280ea107c73cbd2eb86@iki.fi>
Signed-off-by: Mauro Carvalho Chehab <ad86ba2154032c9f55743a190faa2459a9d61d42@redhat.com>

KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs