phy: qcom-qmp-combo: generate pipe clock name

In preparation for supporting devicetree bindings which do not use child
nodes, generate also the USB3 pipe clock name based on the platform
device name as is done for the DP clocks.

Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Signed-off-by: Johan Hovold <johan+linaro@kernel.org>
Link: https://lore.kernel.org/r/20221121085058.31213-6-johan+linaro@kernel.org


Signed-off-by: Vinod Koul <vkoul@kernel.org>