cpu: o3: single cycle default div microop latency on x86
cpu: o3: single cycle default div microop latency on x86

This patch sets the default latency of the division microop to a single cycle
on x86.  This is because the division instructions DIV and IDIV have been
implemented as loops of div microops, where each microop computes a single bit
of the quotient.

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