[SWDEV-300279][MSRCHA-140] Batchnorm backward convergenc fix (#1116)
[SWDEV-300279][MSRCHA-140] Batchnorm backward convergenc fix (#1116)


ROCmSoftwarePlatform/MIOpen,ROCmSoftwarePlatform/MIOpen,ROCmSoftwarePlatform/MIOpen,ROCmSoftwarePlatform/MIOpen,ROCmSoftwarePlatform/MIOpen