radio: iris: Fix the issue with SMD channel

Keep the FM SMD channel open state as the 3rd party application
does not have permission to run fm_dl service where FM SMD channel opening.

Change-Id: I7816077328c0ac14367712f27660046c563439b4
CRs-Fixed: 849294
Signed-off-by: Venkateshwarlu Domakonda <vdomak@codeaurora.org>