mem: Add missing stats update for uncacheable MSHRs
mem: Add missing stats update for uncacheable MSHRs

This patch adds a missing counter update for the uncacheable
accesses. By updating this counter we also get a meaningful average
latency for uncacheable accesses (previously inf).

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