Under CONFIG_DCA the compilation is broken since the commit
bd0362dde080cef377d99fa5beb5c25308c29c73 (ixgbe: Add optional
DCA infrastructure).
IXGBE_SUCCESS is not defined anywhere, replace it with 0.
Signed-off-by: Denis V. Lunev <den@openvz.org>
Signed-off-by: Jeff Garzik <jeff@garzik.org>