mem: Fix WriteLineReq fill behaviour
mem: Fix WriteLineReq fill behaviour

This patch fixes issues in the interactions between deferred snoops
and WriteLineReq. More specifically, the patch addresses an issue
where deferred snoops caused assertion failures when being serviced on
the arrival of an InvalidateResp. The response packet was perceived to
be invalidating, when actually it is not for the cache that sent out
the original invalidation request.

sobercoder/gem5,rallylee/gem5,aclifton/cpeg853-gem5,KuroeKurose/gem5,SanchayanMaity/gem5,powerjg/gem5-ci-test,powerjg/gem5-ci-test,TUD-OS/gem5-dtu,TUD-OS/gem5-dtu,sobercoder/gem5,rallylee/gem5,rallylee/gem5,rjschof/gem5,HwisooSo/gemV-update,sobercoder/gem5,rjschof/gem5,cancro7/gem5,briancoutinho0905/2dsampling,gedare/gem5,Weil0ng/gem5,TUD-OS/gem5-dtu,aclifton/cpeg853-gem5,powerjg/gem5-ci-test,rjschof/gem5,cancro7/gem5,HwisooSo/gemV-update,powerjg/gem5-ci-test,gem5/gem5,rjschof/gem5,gem5/gem5,qizenguf/MLC-STT,SanchayanMaity/gem5,qizenguf/MLC-STT,rjschof/gem5,gem5/gem5,rjschof/gem5,aclifton/cpeg853-gem5,gedare/gem5,Weil0ng/gem5,Weil0ng/gem5,qizenguf/MLC-STT,cancro7/gem5,TUD-OS/gem5-dtu,sobercoder/gem5,TUD-OS/gem5-dtu,briancoutinho0905/2dsampling,gedare/gem5,powerjg/gem5-ci-test,HwisooSo/gemV-update,qizenguf/MLC-STT,sobercoder/gem5,Weil0ng/gem5,KuroeKurose/gem5,gedare/gem5,SanchayanMaity/gem5,cancro7/gem5,qizenguf/MLC-STT,SanchayanMaity/gem5,rallylee/gem5,gedare/gem5,qizenguf/MLC-STT,rallylee/gem5,rallylee/gem5,SanchayanMaity/gem5,rjschof/gem5,gem5/gem5,rallylee/gem5,SanchayanMaity/gem5,powerjg/gem5-ci-test,briancoutinho0905/2dsampling,KuroeKurose/gem5,KuroeKurose/gem5,aclifton/cpeg853-gem5,sobercoder/gem5,gedare/gem5,Weil0ng/gem5,TUD-OS/gem5-dtu,cancro7/gem5,KuroeKurose/gem5,KuroeKurose/gem5,gem5/gem5,gem5/gem5,gem5/gem5,aclifton/cpeg853-gem5,SanchayanMaity/gem5,sobercoder/gem5,HwisooSo/gemV-update,HwisooSo/gemV-update,aclifton/cpeg853-gem5,qizenguf/MLC-STT,Weil0ng/gem5,HwisooSo/gemV-update,briancoutinho0905/2dsampling,KuroeKurose/gem5,HwisooSo/gemV-update,Weil0ng/gem5,cancro7/gem5,aclifton/cpeg853-gem5,briancoutinho0905/2dsampling,briancoutinho0905/2dsampling,TUD-OS/gem5-dtu,gedare/gem5,briancoutinho0905/2dsampling,cancro7/gem5,powerjg/gem5-ci-test