PR #10930: [XLA:CPU] Bug fix for enabling F16 support
PR #10930: [XLA:CPU] Bug fix for enabling F16 support

Imported from GitHub PR https://github.com/openxla/xla/pull/10930

This PR fixes a bug for f16 matmul enabling.
Since dot is supported in f16, there is no need for adding an extra convert instruction after fusion similar to the bf16 case.
Also add missed changes in build file.
Copybara import of the project:

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45f7fdbac38cf011707c704cf4e75b49261d0339 by Kanvi Khanna <kanvi.khanna@intel.com>:

Bug-Fix:Since dot has f16 support,remove extra convert after fusion; add missing build file change

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af9d2c4f7a92e3d647f15c9d25be047461df8dea by Kanvi Khanna <kanvi.khanna@intel.com>:

fix buildifier

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3587ef104f9b47c2fd05dda1f0008cd3b53da421 by Kanvi Khanna <kanvi.khanna@intel.com>:

address comment

Merging this change closes #10930

FUTURE_COPYBARA_INTEGRATE_REVIEW=https://github.com/openxla/xla/pull/10930 from Intel-tensorflow:kanvi/f16-bug-fix 3587ef104f9b47c2fd05dda1f0008cd3b53da421
