[PATCH] 8139too NAPI for net-drivers-2.5-exp

Here is the 8139too version in net-drivers-2.5-exp modified for NAPI.
Also:
	64k receive ring - has to handle wrap for that case;
	   the NoWrap flag does nothing if using this big ring.
	assert() -> BUG_ON()

To deal with the races with tx_timeout, put back in the rx_lock from earlier versions.