qlge: reset the chip before freeing the buffers

Qlge is freeing the buffers before stopping the card DMA, and
this can cause some severe error, as a EEH event on PPC.

This patch just stop the card and then free the resources.

Signed-off-by: Breno Leitao <leitao@linux.vnet.ibm.com>
Signed-off-by: Ron Mercer <ron.mercer@qlogic.com>
Signed-off-by: David S. Miller <davem@davemloft.net>