BACKPORT: FROMLIST: dt-bindings: Add Qualcomm USB Super-Speed PHY bindings

Binding description for Qualcomm's Synopsys 1.0.0 super-speed PHY
controller embedded in QCS404.

Based on Sriharsha Allenki's <sallenki@codeaurora.org> original
definitions.

am link: https://patchwork.kernel.org/patch/10717757/



Signed-off-by: Jorge Ramirez-Ortiz <jorge.ramirez-ortiz@linaro.org>
Reviewed-by: Vinod Koul <vkoul@kernel.org>
Signed-off-by: Khasim Syed Mohammed <khasim.mohammed@linaro.org>