compat-wireless: Handle name change from iwlagn to iwlwifi in 3.2

compat-wireless: Handle name change from iwlagn to iwlwifi in 3.2

With linux-3.2 the iwlagn driver is renamed iwlwifi.  For some kernels
(like 3.1.5) this causes the non-compat iwlagn.ko to try and run against
the compat mac80211 resulting in an oops.  This change prevents the
non-compat iwlagn.ko from being loaded.

Signed-off-by: Don Fry <donald.h.fry@intel.com>
Signed-off-by: Luis R. Rodriguez <mcgrof@frijolero.org>