fix transmit side checksum offloading to not generate a pseudo header.
fix transmit side checksum offloading to not generate a pseudo header.

dev/ns_gige.cc:
    transmit side checksum offloading doesn't need pseudo header generation, it just takes the pseudo header checksum and uses it.

--HG--
extra : convert_revision : 9741bd650415c18ed37b06a453b23610d028135b

cancro7/gem5,Weil0ng/gem5,Weil0ng/gem5,aclifton/cpeg853-gem5,kaiyuanl/gem5,rallylee/gem5,briancoutinho0905/2dsampling,rallylee/gem5,markoshorro/gem5,briancoutinho0905/2dsampling,qizenguf/MLC-STT,rallylee/gem5,powerjg/gem5-ci-test,HwisooSo/gemV-update,TUD-OS/gem5-dtu,SanchayanMaity/gem5,yb-kim/gemV,SanchayanMaity/gem5,austinharris/gem5-riscv,austinharris/gem5-riscv,zlfben/gem5,austinharris/gem5-riscv,austinharris/gem5-riscv,rjschof/gem5,joerocklin/gem5,samueldotj/TeeRISC-Simulator,sobercoder/gem5,samueldotj/TeeRISC-Simulator,KuroeKurose/gem5,kaiyuanl/gem5,powerjg/gem5-ci-test,Weil0ng/gem5,kaiyuanl/gem5,powerjg/gem5-ci-test,aclifton/cpeg853-gem5,briancoutinho0905/2dsampling,gem5/gem5,samueldotj/TeeRISC-Simulator,kaiyuanl/gem5,briancoutinho0905/2dsampling,HwisooSo/gemV-update,SanchayanMaity/gem5,qizenguf/MLC-STT,rallylee/gem5,gedare/gem5,qizenguf/MLC-STT,markoshorro/gem5,rjschof/gem5,KuroeKurose/gem5,TUD-OS/gem5-dtu,sobercoder/gem5,powerjg/gem5-ci-test,rjschof/gem5,gedare/gem5,yb-kim/gemV,yb-kim/gemV,sobercoder/gem5,SanchayanMaity/gem5,austinharris/gem5-riscv,zlfben/gem5,cancro7/gem5,joerocklin/gem5,markoshorro/gem5,TUD-OS/gem5-dtu,SanchayanMaity/gem5,markoshorro/gem5,HwisooSo/gemV-update,joerocklin/gem5,austinharris/gem5-riscv,austinharris/gem5-riscv,cancro7/gem5,sobercoder/gem5,rallylee/gem5,TUD-OS/gem5-dtu,KuroeKurose/gem5,gedare/gem5,kaiyuanl/gem5,joerocklin/gem5,HwisooSo/gemV-update,Weil0ng/gem5,yb-kim/gemV,powerjg/gem5-ci-test,samueldotj/TeeRISC-Simulator,gem5/gem5,yb-kim/gemV,cancro7/gem5,TUD-OS/gem5-dtu,briancoutinho0905/2dsampling,KuroeKurose/gem5,gem5/gem5,yb-kim/gemV,zlfben/gem5,gedare/gem5,powerjg/gem5-ci-test,briancoutinho0905/2dsampling,cancro7/gem5,zlfben/gem5,samueldotj/TeeRISC-Simulator,rjschof/gem5,powerjg/gem5-ci-test,TUD-OS/gem5-dtu,gedare/gem5,HwisooSo/gemV-update,rallylee/gem5,rjschof/gem5,aclifton/cpeg853-gem5,gem5/gem5,markoshorro/gem5,kaiyuanl/gem5,joerocklin/gem5,rallylee/gem5,rjschof/gem5,KuroeKurose/gem5,joerocklin/gem5,joerocklin/gem5,aclifton/cpeg853-gem5,sobercoder/gem5,samueldotj/TeeRISC-Simulator,HwisooSo/gemV-update,samueldotj/TeeRISC-Simulator,aclifton/cpeg853-gem5,HwisooSo/gemV-update,qizenguf/MLC-STT,cancro7/gem5,gem5/gem5,zlfben/gem5,KuroeKurose/gem5,markoshorro/gem5,qizenguf/MLC-STT,zlfben/gem5,sobercoder/gem5,aclifton/cpeg853-gem5,yb-kim/gemV,SanchayanMaity/gem5,cancro7/gem5,yb-kim/gemV,briancoutinho0905/2dsampling,joerocklin/gem5,TUD-OS/gem5-dtu,kaiyuanl/gem5,Weil0ng/gem5,gedare/gem5,rjschof/gem5,KuroeKurose/gem5,Weil0ng/gem5,qizenguf/MLC-STT,SanchayanMaity/gem5,markoshorro/gem5,gem5/gem5,qizenguf/MLC-STT,aclifton/cpeg853-gem5,gedare/gem5,Weil0ng/gem5,zlfben/gem5,gem5/gem5,sobercoder/gem5