[PATCH] sky2: fixes for Yukon EC_U chip revisions

Update workarounds for 88E803X based on the latest SysKonnect vendor
driver version (8.41). Tested on EC_U rev A1, only.
These up the receive performance.

Signed-off-by: Stephen Hemminger <shemminger@osdl.org>
Signed-off-by: Jeff Garzik <jeff@garzik.org>