iwl3945: unmap previously mapped memory

During preparation of TX we create DMA mapping to TX command as part of
preparing the TFD. This mapping needs to be cleared at the time TFD is
freed.

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