mem: Avoid unecessary checks when creating HardPFReq in cache
mem: Avoid unecessary checks when creating HardPFReq in cache

The checks made before sending out a HardPFReq were unecessarily
complex, and checked for cases that never occur. This patch
tidies it up.

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