FROMGIT: phy: realtek: usb: Add driver for the Realtek SoC USB 3.0 PHY

Realtek DHC (digital home center) RTD SoCs support DWC3 XHCI USB
controller. Added the driver to drive the USB 3.0 PHY transceivers.

Signed-off-by: Stanley Chang <stanley_chang@realtek.com>
Link: https://lore.kernel.org/r/20230725033318.8361-3-stanley_chang@realtek.com


Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

Bug: 286930662
(cherry picked from commit adda6e82
git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git

 usb-next)
Change-Id: Icba27bdd44778e4d09006c86acf805d97db5746b
Signed-off-by: Stanley Chang <stanley_chang@realtek.com>