USB: storage: Use USB_ prefix instead of US_ prefix

This commit changes prefix for some of the USB mass storage
class related macros (ie. USB_SC_ for subclass and USB_PR_
for class).

Signed-off-by: Michal Nazarewicz <mina86@mina86.com>
Cc: Alan Stern <stern@rowland.harvard.edu>
Cc: Matthew Wilcox <willy@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

diff --git a/drivers/block/ub.c b/drivers/block/ub.c
index c48e148..f3fd454 100644
--- a/drivers/block/ub.c
+++ b/drivers/block/ub.c
@@ -396,7 +396,7 @@
 #else
 
 static const struct usb_device_id ub_usb_ids[] = {
-	{ USB_INTERFACE_INFO(USB_CLASS_MASS_STORAGE, US_SC_SCSI, US_PR_BULK) },
+	{ USB_INTERFACE_INFO(USB_CLASS_MASS_STORAGE, USB_SC_SCSI, USB_PR_BULK) },
 	{ }
 };