config: Fix typo in Float param
config: Fix typo in Float param

The Float param was not settable on the command line
due to a typo in the class definition in
python/m5/params.py.  This corrects the typo and allows
floats to be set on the command line as intended.

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