Add data format into MKL maxpool cache key.
@gzmkl please review. @penpornk  I have reviewed the code change which is fine. Thanks!  --GZ Hi @penpornk Can you please review this PR ? Thank you! Hi @penpornk Can you please review this PR ? Thank you! Hi @penpornk Can you please review this PR ? Thank you! Hi @penpornk Can you please review this PR ? Thank you! Hi @penpornk Can you please review this PR ? Thank you! Hi @penpornk Can you please review this PR ? Thank you!
Resolves tensorflow/tensorflow#61482