radio: iris: Set band limits as passed from upper layer

Seek up/down in some band is tuning to a station
which is out of band becuase band limits passed from upper
layer are not used

Change-Id: Ic7d11cb33e7964d385be04b0d2e007889ccc1429
CRs-Fixed: 384287
Signed-off-by: Ayaz Ahmad <aahmad@codeaurora.org>