phy: qcom: edp: Generate unique clock names

With multiple Displayport PHYs the hard coded clock names collides,
generate unique clock names based on the device name instead.

Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Link: https://lore.kernel.org/r/20220810040745.3582985-3-bjorn.andersson@linaro.org


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