Staging: vt6655: Remove CARDbRadioPowerOn definition.

Remove function CARDbRadioPowerOn that is never called, along with
comments related to it.

Signed-off-by: Briana Oursler <briana.oursler@gmail.com>
Reviewed-by: Stefano Brivio <sbrivio@redhat.com>
Link: https://lore.kernel.org/r/e64c02aadd0b846604c755989b39f374161a87e0.1585802818.git.briana.oursler@gmail.com


Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>