Full 32bit flowid from igb(4)

[Adrian Chadd]

No, you're absolutely right. However, you (a) get flowid for L3/L4
V4/v6 but not other things, and (b) I was worried about changing the
default behaviour of the driver, and who knows what other weird crap
people may have done to their local driver. stuff like enabled
checksums instead, or hacked in flowtable support. :)

So, I'm totally fine if you want to populate the flowid for a given
flow. Totally okay. You just can't set it blindly - you can only set
it when the relevant descriptor bits say "it's a flowid!". Then I
guess we'll figure out if something breaks down the line.



-adrian