usb: dwc2: Add exit clock gating when port reset is asserted

Adds clock gating exit flow when set port feature
reset is received in suspended state.

Signed-off-by: Artur Petrosyan <Arthur.Petrosyan@synopsys.com>
Link: https://lore.kernel.org/r/20210413073646.27217A0094@mailhost.synopsys.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>