phy: freescale: Add DisplayPort PHY driver for i.MX8MQ Add Cadence HDP-TX DisplayPort PHY driver for i.MX8MQ Cadence HDP-TX PHY could be put in either DP mode or HDMI mode base on the configuration chosen. DisplayPort PHY mode is configurated in the driver. Signed-off-by: Sandor Yu <Sandor.yu@nxp.com> Link: https://lore.kernel.org/r/cb8b6baefb339e05df5856bb916231a19a0aa111.1694047629.git.Sandor.yu@nxp.com Signed-off-by: Vinod Koul <vkoul@kernel.org>