USB: remove warn() macro from usb drivers

USB should not be having it's own printk macros, so remove warn() and
use the system-wide standard of dev_warn() wherever possible.  In the
few places that will not work out, use a basic printk().

Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

diff --git a/drivers/usb/misc/usblcd.c b/drivers/usb/misc/usblcd.c
index 2db4228..d589324 100644
--- a/drivers/usb/misc/usblcd.c
+++ b/drivers/usb/misc/usblcd.c
@@ -311,7 +311,7 @@
 	dev->interface = interface;
 
 	if (le16_to_cpu(dev->udev->descriptor.idProduct) != 0x0001) {
-		warn(KERN_INFO "USBLCD model not supported.");
+		dev_warn(&interface->dev, "USBLCD model not supported.\n");
 		return -ENODEV;
 	}