feat(mt8196): add UFS functions used by the static library

Those functions are used by the static library. To reduce the
proprietary code's reliance on other drivers, these functions should be
moved

feat(mt8196): add UFS functions used by the static library

Those functions are used by the static library. To reduce the
proprietary code's reliance on other drivers, these functions should be
moved to the upstream repository.

Change-Id: I6a9430c24bb1f9c1d473b43e65168b620e6bd6b9
Signed-off-by: Yidi Lin <yidilin@chromium.org>

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