arm: m5ops readfile64 args broken, offset coming through garbage
arm: m5ops readfile64 args broken, offset coming through garbage

There were several sections of the m5ops code which were
essentially copy/pasted versions of the 32-bit code. The
problem is that some of these didn't account fo4 64-bit
registers leading to arguments being in the wrong registers.
This patch addresses the args for readfile64, writefile64,
and addsymbol64 -- all of which seemed to suffer from a
similar set of problems when moving to 64-bit.

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