Replace the references to the iwl_priv structure with the iwl_trans
structure as the priv structure is never referenced other than to
access the trans structure.  Rename from iwlagn to iwl.
Signed-off-by: NDon Fry <donald.h.fry@intel.com>
Signed-off-by: NWey-Yi Guy <wey-yi.w.guy@intel.com>