phy: qcom-qmp-combo: separate USB and DP init ops

Separate the USB and DP init and exit operations by calling the common
initialisation code directly from the USB operation and adding a "dp"
infix to the DP callbacks.

Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Signed-off-by: Johan Hovold <johan+linaro@kernel.org>
Link: https://lore.kernel.org/r/20221114110621.4639-9-johan+linaro@kernel.org


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