Revert "dt-bindings: mmc: Add supports-cqe property"

This reverts commit eb83f9fa.

This is a preparation change for merging android-4.19-q.73 into
msm-4.19 branch.

[1] is conflicting against [2] in msm-4.19.

[1] eb83f9fa("dt-bindings: mmc: Add supports-cqe property")
[2] 728aba9a("Documentation: devicetree: Remove devicetree bindings from kernel")

Change-Id: I5587de5c3706b9568f4d3956611e0d2543ecd849
Signed-off-by: Ivaylo Georgiev <irgeorgiev@codeaurora.org>