Merge patch series "Add SpacemiT K1 USB3.0 host controller support"

Ze Huang <huang.ze@linux.dev> says:

The USB 3.0 controller found in the SpacemiT K1 SoC[1] supports both
USB3.0 Host and USB2.0 Dual-Role Device (DRD).

This controller is compatible with DesignWare Core USB 3 (DWC3) driver.
However, constraints in the `snps,dwc3` bindings limit the ability to
describe hardware-specific features in a clean and maintainable way.
While `dwc3-of-simple` still serves as a glue layer for many platforms,
it requires a split device tree node structure, which is less desirable
in newer platforms.

To promote a transition toward a flattened `dwc` node structure, this
series introduces `dwc3-generic-plat`, building upon prior efforts that
exposed the DWC3 core driver [2].

The device tree support for SpacemiT K1 will be submitted separately
when the associated PHY driver is ready.

Link: https://developer.spacemit.com/documentation?token=AjHDwrW78igAAEkiHracBI9HnTb
Link: https://lore.kernel.org/all/20250414-dwc3-refactor-v7-3-f015b358722d@oss.qualcomm.com
Link: https://lore.kernel.org/r/20250913-dwc3_generic-v8-0-b50f81f05f95@linux.dev
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>