Add AST2700 USB3.2 PHY support.
 - Supports Super Speed Plus Gen2x1 (10 Gbps), Super Speed (5 Gbps),
   High Speed (480 Mbps), Full Speed (12Mbps), and Low Speed (1.5 Mbps).

Signed-off-by: Ryan Chen <ryan_chen@aspeedtech.com>
---
Changes in v3:
- Wire drivers/phy/aspeed/ into drivers/phy/Kconfig and
  drivers/phy/Makefile so the driver is actually built.
- Fix the Makefile config symbol to CONFIG_PHY_ASPEED_USB3 to match
  the Kconfig symbol.
- Expand the Kconfig help text.
- Link to v2: https://lore.kernel.org/r/20260116-upstream_usb3phy-v2-0-0b0c9f3eb6f4@aspeedtech.com

Changes in v2:
- aspeed,ast2700-usb3-phy.yaml
 - Drop clocks, resets descripton.
- Kconfig
 - add COMPILE_TEST, remove default n
- Link to v1: https://lore.kernel.org/r/20260114-upstream_usb3phy-v1-0-2e59590be2d7@aspeedtech.com

---
Ryan Chen (3):
      dt-bindings: phy: aspeed: Document AST2700 USB3.2 PHY
      phy: aspeed: Add AST2700 USB3.2 PHY driver
      MAINTAINERS: Add ASPEED USB3 PHY driver

 .../bindings/phy/aspeed,ast2700-usb3-phy.yaml      |  48 +++++
 MAINTAINERS                                        |   8 +
 drivers/phy/Kconfig                                |   1 +
 drivers/phy/Makefile                               |   1 +
 drivers/phy/aspeed/Kconfig                         |  15 ++
 drivers/phy/aspeed/Makefile                        |   2 +
 drivers/phy/aspeed/phy-aspeed-usb3.c               | 236 +++++++++++++++++++++
 7 files changed, 311 insertions(+)
---
base-commit: 948efecf22e49aa4bf55bb73ec79a0ddcfd38571
change-id: 20260112-upstream_usb3phy-7116f8dfe779

Best regards,
-- 
Ryan Chen <ryan_chen@aspeedtech.com>