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

drivers/usb/dwc2/core_intr.c

@@ -423,15 +423,14 @@ static void dwc2_handle_wakeup_detected_intr(struct dwc2_hsotg *hsotg)
 			hsotg->lx_state = DWC2_L0;
 		}
 	} else {
-		if (hsotg->params.power_down)
-			return;
-
-		if (hsotg->lx_state != DWC2_L1) {
-			u32 pcgcctl = dwc2_readl(hsotg, PCGCTL);
-
-			/* Restart the Phy Clock */
-			pcgcctl &= ~PCGCTL_STOPPCLK;
-			dwc2_writel(hsotg, pcgcctl, PCGCTL);
+		if (hsotg->lx_state == DWC2_L2) {
+			if (hsotg->in_ppd) {
+				ret = dwc2_exit_partial_power_down(hsotg, 1,
+								   true);
+				if (ret)
+					dev_err(hsotg->dev,
+						"exit partial_power_down failed\n");
+			}
 
 			/*
 			 * If we've got this quirk then the PHY is stuck upon