staging: dwc2: remove dummy interrupt handling

The handling for the IC2INT and RESTOREDONE interrupts just cleared the
interrupt flag, but did not do anything else. Since these interrupts are
not enabled anywhere, they should never trigger and there should never
be a need to clear their flags, so we can safely remove this code.

Signed-off-by: Matthijs Kooijman <matthijs@stdin.nl>
Acked-by: Paul Zimmerman <paulz@synopsys.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/dwc2/core_intr.c

@@ -403,8 +403,7 @@ static void dwc2_handle_usb_suspend_intr(struct dwc2_hsotg *hsotg)
 #define GINTMSK_COMMON	(GINTSTS_WKUPINT | GINTSTS_SESSREQINT |		\
 			 GINTSTS_CONIDSTSCHNG | GINTSTS_OTGINT |	\
 			 GINTSTS_MODEMIS | GINTSTS_DISCONNINT |		\
-			 GINTSTS_USBSUSP | GINTSTS_RESTOREDONE |	\
-			 GINTSTS_PRTINT)
+			 GINTSTS_USBSUSP | GINTSTS_PRTINT)
 
 /*
  * This function returns the Core Interrupt register
@@ -478,12 +477,6 @@ irqreturn_t dwc2_handle_common_intr(int irq, void *dev)
 	if (gintsts & GINTSTS_USBSUSP)
 		dwc2_handle_usb_suspend_intr(hsotg);
 
-	if (gintsts & GINTSTS_RESTOREDONE) {
-		gintsts = GINTSTS_RESTOREDONE;
-		writel(gintsts, hsotg->regs + GINTSTS);
-		dev_dbg(hsotg->dev, " --Restore done interrupt received--\n");
-	}
-
 	if (gintsts & GINTSTS_PRTINT) {
 		/*
 		 * The port interrupt occurs while in device mode with HPRT0

drivers/staging/dwc2/hcd_intr.c

@@ -2104,9 +2104,6 @@ irqreturn_t dwc2_handle_hcd_intr(struct dwc2_hsotg *hsotg)
 			dwc2_rx_fifo_level_intr(hsotg);
 		if (gintsts & GINTSTS_NPTXFEMP)
 			dwc2_np_tx_fifo_empty_intr(hsotg);
-		if (gintsts & GINTSTS_I2CINT)
-			/* Todo: Implement i2cintr handler */
-			writel(GINTSTS_I2CINT, hsotg->regs + GINTSTS);
 		if (gintsts & GINTSTS_PRTINT)
 			dwc2_port_intr(hsotg);
 		if (gintsts & GINTSTS_HCHINT)