iwl3945: add debugging for wrong command queue

We encountered a problem related to this BUG and need to obtain more
debugging information. See bug report at
http://marc.info/?l=linux-wireless&m=123147215829854&w=2



Signed-off-by: Reinette Chatre <reinette.chatre@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>