linux-imx

MLK-16065-7 usb: cdns3: add Cadence USB3 controller driver

Add Cadence USB3 IP driver, this is the 1st version for this driver,
so wrapper layer and PHY layer are still IP core file (core.c).
Below functions are supported:

- Basic host function
- Limited gadget function, only ACM (old g_seiral) are supported, and
mass_storage support is not very well.
- Role switch between host and device through extcon design
(Eg, Type-C application NXP PTN5150).

Below functions are missing:
- Multi-queue support at gadget function, without this feature, many
gadget function are missing.
- Low power mode support, including system PM and runtime PM
- Wakeup support

Signed-off-by: Peter Chen <peter.chen@nxp.com>
(cherry picked from commit ef808bfac1ca34311d5dd49e847b5e45a69e75ee)