mem: Merge interleaved ranges when creating backing store
mem: Merge interleaved ranges when creating backing store

This patch adds merging of interleaved ranges before creating the
backing stores. The backing stores are always a contigous chunk of the
address space, and with this patch it is possible to have interleaved
memories in the system.

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