usb: dwc2: Add partial power down exit flow in wakeup intr.

According to programming guide added host partial power
down exit flow in wakeup detected interrupt handler.

Acked-by: Minas Harutyunyan <Minas.Harutyunyan@synopsys.com>
Signed-off-by: Artur Petrosyan <Arthur.Petrosyan@synopsys.com>
Link: https://lore.kernel.org/r/20210408094454.5BBCBA0094@mailhost.synopsys.com


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