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/usb/storage/unusual_freecom.h b/drivers/usb/storage/unusual_freecom.h
index 3758679..59a2611 100644
--- a/drivers/usb/storage/unusual_freecom.h
+++ b/drivers/usb/storage/unusual_freecom.h
@@ -21,6 +21,6 @@
 UNUSUAL_DEV(  0x07ab, 0xfc01, 0x0000, 0x9999,
 		"Freecom",
 		"USB-IDE",
-		US_SC_QIC, US_PR_FREECOM, init_freecom, 0),
+		USB_SC_QIC, USB_PR_FREECOM, init_freecom, 0),
 
 #endif /* defined(CONFIG_USB_STORAGE_FREECOM) || ... */