usb: core: hub: improve port over-current alert msg

At the moment the port over-current message is
displayed only if the over-current condition is permanent.

But in case of permanent short-circuit or
over-current, some USB power-distribution switches
(such as the TPS20xx, etc.), after the over-current
detection and the consequent shutdown, return
in the normal state.

So, in these cases, the over-current error message
never appears.

To overcome this problem, the "over-current condition"
message is displayed even after some over-current events.

Signed-off-by: Flavio Suligoi <f.suligoi@asem.it>

arch/arm64/boot/dts/Makefile

@@ -8,6 +8,7 @@ subdir-y += amlogic
 subdir-y += apm
 subdir-y += apple
 subdir-y += arm
+subdir-y += asem
 subdir-y += bitmain
 subdir-y += broadcom
 subdir-y += cavium

drivers/usb/core/hub.c

@@ -5577,7 +5577,8 @@ static void port_event(struct usb_hub *hub, int port1)
 		msleep(100);	/* Cool down */
 		hub_power_on(hub, true);
 		hub_port_status(hub, port1, &status, &unused);
-		if (status & USB_PORT_STAT_OVERCURRENT)
+		if ((status & USB_PORT_STAT_OVERCURRENT) ||
+		    !(port_dev->over_current_count % 15))
 			dev_err(&port_dev->dev, "over-current condition\n");
 	}
 
@@ -5738,7 +5739,7 @@ static void hub_event(struct work_struct *work)
 			u16 status = 0;
 			u16 unused;
 
-			dev_dbg(hub_dev, "over-current change\n");
+			dev_info(hub_dev, "over-current change\n");
 			clear_hub_feature(hdev, C_HUB_OVER_CURRENT);
 			msleep(500);	/* Cool down */
 			hub_power_on(hub, true);