usb: storage: Show number of storage devices detected for DM_USB

By enabling DM_USB information about number of storage devices
was lost.
Get this information back simply by printing number of devices detected
via BLK uclass.

For example:
scanning bus 0 for devices... 7 USB Device(s) found
       scanning usb for storage devices... 3 Storage Device(s) found
       scanning usb for ethernet devices... 0 Ethernet Device(s) found

Signed-off-by: Michal Simek <michal.simek@xilinx.com>

cmd/usb.c

@@ -571,11 +571,11 @@ static void do_usb_start(void)
 		return;
 
 	/* Driver model will probe the devices as they are found */
-#ifndef CONFIG_DM_USB
 # ifdef CONFIG_USB_STORAGE
 	/* try to recognize storage devices immediately */
 	usb_stor_curr_dev = usb_stor_scan(1);
 # endif
+#ifndef CONFIG_DM_USB
 # ifdef CONFIG_USB_KEYBOARD
 	drv_usb_kbd_init();
 # endif

common/usb_storage.c

@@ -303,7 +303,6 @@ void usb_stor_reset(void)
 	usb_max_devs = 0;
 }
 
-#ifndef CONFIG_DM_USB
 /*******************************************************************************
  * scan the usb and reports device info
  * to the user if mode = 1
@@ -311,11 +310,12 @@ void usb_stor_reset(void)
  */
 int usb_stor_scan(int mode)
 {
-	unsigned char i;
-
 	if (mode == 1)
 		printf("       scanning usb for storage devices... ");
 
+#ifndef CONFIG_DM_USB
+	unsigned char i;
+
 	usb_disable_asynch(1); /* asynch transfer not allowed */
 
 	usb_stor_reset();
@@ -329,12 +329,12 @@ int usb_stor_scan(int mode)
 	} /* for */
 
 	usb_disable_asynch(0); /* asynch transfer allowed */
+#endif
 	printf("%d Storage Device(s) found\n", usb_max_devs);
 	if (usb_max_devs > 0)
 		return 0;
 	return -1;
 }
-#endif
 
 static int usb_stor_irq(struct usb_device *dev)
 {