phy: Add Google Tensor SoC USB PHY driver

phy: Add Google Tensor SoC USB PHY driver

Support the USB PHY found on Google Tensor G5 (Laguna). This
particular USB PHY supports both high-speed and super-speed
operations, and is integrated with the SNPS DWC3 controller that's
also on the SoC. This initial patch specifically adds functionality
for high-speed.

Co-developed-by: Joy Chakraborty <joychakr@google.com>
Signed-off-by: Joy Chakraborty <joychakr@google.com>
Co-developed-by: Naveen Kumar <mnkumar@google.com>
Signed-off-by: Naveen Kumar <mnkumar@google.com>
Signed-off-by: Roy Luo <royluo@google.com>
Link: https://patch.msgid.link/20251227-phyb4-v10-2-e8caf6b93fe7@google.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>