[ewg] [GIT PULL ofed-1.4] cxgb3 lro backport fixes

[Steve Wise]

Vlad,

Please pull from:

git://git.openfabrics.org/~swise/ofed-1.4 stevo

This commit adds backport patches to remove LRO from cxgb3 for older 
kernels.


Thanks,

Steve.