usb: dwc3: dwc3-am62: Re-initialize controller if lost power in PM suspend

usb: dwc3: dwc3-am62: Re-initialize controller if lost power in PM suspend

If controller looses power during PM suspend then re-initialize
it. We use the DEBUG_CFG register to track if controller lost power
or was reset in PM suspend.

Move all initialization code into dwc3_ti_init() so it can be re-used.

Signed-off-by: Roger Quadros <rogerq@kernel.org>
Acked-by: Thinh Nguyen <Thinh.Nguyen@synopsys.com>
Link: https://lore.kernel.org/r/20241212-am62-dwc3-io-ddr-v3-1-10b95cd7e9c0@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>