[media] radio-si4713: improve querycap
[media] radio-si4713: improve querycap

Set bus_info and fill in device_caps.

Signed-off-by: Hans Verkuil <3a513708f73c27e7d36ebc496aa41dad6a3153ea@cisco.com>
Acked-by: Eduardo Valentin <19583d7f5a73f900a77b3924aabdcb631a4c7608@gmail.com>
Tested-by: Eduardo Valentin <19583d7f5a73f900a77b3924aabdcb631a4c7608@gmail.com>
Signed-off-by: Mauro Carvalho Chehab <ad86ba2154032c9f55743a190faa2459a9d61d42@redhat.com>

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