Add enum for Tensorflow padding mode
Add enum for Tensorflow padding mode

Signed-off-by: Peter Y. Yeh <eaf91620ce75fe87f396eca0a143eb3507a023ae@amd.com>

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