dt-bindings: remove phy/phy-qcom-qmp.h in favor of dts/upstream

The upstream version has new defines use to build DT, drop
it in favor of the dts/upstream more recent one.

Signed-off-by: Neil Armstrong <neil.armstrong@linaro.org>
Reviewed-by: Sumit Garg <sumit.garg@linaro.org>
Reviewed-by: Caleb Connolly <caleb.connolly@linaro.org>