qlge: Add RX frame handlers for non-split frames.

New handlers are added here to handle:
1) Small frames (<256 bytes) in a single small buffer.  Allocate a new
skb and copy the frame.

2) Large frame (>256 bytes) in a page chunk. Allocate an skb, tack it on frags,
post to napi_gro_receive().

Signed-off-by: Ron Mercer <ron.mercer@qlogic.com>
Signed-off-by: David S. Miller <davem@davemloft.net>