dm: usb: Simply device finding code in usb_storage

The for() loop is not needed since the value is immediately accessible.
Use this instead to simplify the code.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Marek Vasut <marex@denx.de>

common/usb_storage.c

@@ -1018,7 +1018,7 @@ unsigned long usb_stor_read(int device, lbaint_t blknr,
 	unsigned short smallblks;
 	struct usb_device *dev;
 	struct us_data *ss;
-	int retry, i;
+	int retry;
 	ccb *srb = &usb_ccb;
 
 	if (blkcnt == 0)
@@ -1026,14 +1026,11 @@ unsigned long usb_stor_read(int device, lbaint_t blknr,
 
 	device &= 0xff;
 	/* Setup  device */
-	debug("\nusb_read: dev %d \n", device);
-	dev = NULL;
-	for (i = 0; i < USB_MAX_DEVICE; i++) {
-		dev = usb_get_dev_index(i);
-		if (dev == NULL)
-			return 0;
-		if (dev->devnum == usb_dev_desc[device].target)
-			break;
+	debug("\nusb_read: dev %d\n", device);
+	dev = usb_dev_desc[device].priv;
+	if (!dev) {
+		debug("%s: No device\n", __func__);
+		return 0;
 	}
 	ss = (struct us_data *)dev->privptr;
 
@@ -1091,7 +1088,7 @@ unsigned long usb_stor_write(int device, lbaint_t blknr,
 	unsigned short smallblks;
 	struct usb_device *dev;
 	struct us_data *ss;
-	int retry, i;
+	int retry;
 	ccb *srb = &usb_ccb;
 
 	if (blkcnt == 0)
@@ -1099,15 +1096,10 @@ unsigned long usb_stor_write(int device, lbaint_t blknr,
 
 	device &= 0xff;
 	/* Setup  device */
-	debug("\nusb_write: dev %d \n", device);
-	dev = NULL;
-	for (i = 0; i < USB_MAX_DEVICE; i++) {
-		dev = usb_get_dev_index(i);
-		if (dev == NULL)
-			return 0;
-		if (dev->devnum == usb_dev_desc[device].target)
-			break;
-	}
+	debug("\nusb_write: dev %d\n", device);
+	dev = usb_dev_desc[device].priv;
+	if (!dev)
+		return 0;
 	ss = (struct us_data *)dev->privptr;
 
 	usb_disable_asynch(1); /* asynch transfer not allowed */