qcacld-3.0: Refine the Roam Scan Offload callback API

The Roam Scan Offload (RSO) callback currently specifies a void
pointer for the context. In the case of this API the context is
actually known to be an HDD handle, so update the API to explicitly
use this type. This will allow the compiler to verify that the correct
type of parameter is being passed.

Change-Id: I9f3098a9f4bc840ef2f6210717849db5d4dd2c2a
CRs-fixed: 2278584
5 files changed