radio-iris: Return hardware capabilities

- Radio iris isn't properly advertising its hardware capabilities to
  userspace which makes it look like radio is unsupported.
  Fix this so that userspace sees that radio is in fact supported
- Upadate the hardware capabilities while returning response to query
  device capabilities.

CRs-fixed: 512171
Change-Id: I52d6479cfc1e974735be5f835a0d564fb6d5c1d4
Signed-off-by: Venkateshwarlu Domakonda <Venkateshwarlu@codeaurora.org>