linux: ixgbe: use IXGBE_SRRCTL_BSIZEHDRSIZE_SHIFT macro instead of "2"
linux: ixgbe: use IXGBE_SRRCTL_BSIZEHDRSIZE_SHIFT macro instead of "2"

luigirizzo/netmap,luigirizzo/netmap,luigirizzo/netmap,luigirizzo/netmap,luigirizzo/netmap