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/atm/xusbatm.c b/drivers/usb/atm/xusbatm.c
index 8472543..17d167b 100644
--- a/drivers/usb/atm/xusbatm.c
+++ b/drivers/usb/atm/xusbatm.c
@@ -193,7 +193,7 @@
 	    num_vendor != num_product ||
 	    num_vendor != num_rx_endpoint ||
 	    num_vendor != num_tx_endpoint) {
-		warn("malformed module parameters");
+		printk(KERN_WARNING "xusbatm: malformed module parameters\n");
 		return -EINVAL;
 	}