ixgbe: remove some redundant code in setting FCoE FIP filter

The ETQS setup for FIP out side the if..else is enough for the ETQS
setup for FIP, so remove redundant code.

Signed-off-by: Yi Zou <yi.zou@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>