Modify store code for mfma 16x16x1x4 (#857)
Modify store code for mfma 16x16x1x4 (#857)

* Modify store code for mfma 16x16x1x4
* Fix read offset for multi-column 16x16
ROCmSoftwarePlatform/Tensile,ROCmSoftwarePlatform/Tensile,ROCmSoftwarePlatform/Tensile