qcacmn: Maintain wiphy init and de-init states

Wiphy is attached to pdev after pdev has been created, but before pdev
is opened. So maintain the state of wiphy in pdev open and close
callbacks. While calling regulatory callbacks, check the wiphy init
state.

Change-Id: I51243017ac24bc4473abddbfd0506b9e3490de4a
CRs-Fixed: 2718363