pcnet32: NAPI support

These patches to the pcnet32 driver implement NAPI and fix some other errors found during NAPI development and testing. Please apply to 2.6.18.

1/9 Fix Section mismatch error
2/9 Use PCI_DEVICE macro
3/9 Fix off-by-one in get_ringparam
4/9 Use kcalloc instead of kmalloc and memset
5/9 Handle memory allocation failures cleanly when resizing tx/rx rings 6/9 Suspend the chip rather than restart when changing multicast/promisc 7/9 Cleanup rx buffers after loopback test.
8/9 NAPI implementation.
9/9 Magic number cleanup.

Don Fry
[email protected]