USB: usb-storage: new "lockable" subclass 0x07

This patch (as1011) adds a #define for the newly-created Lockable
(i.e., password-protected) subclass 0x07 for USB mass-storage devices.
The private ISD200 entry (which had been mapped to subclass 0x07) is
moved to 0xf0, which is unlikely to conflict with any official
subclass designation.

The US_SC_MIN and US_SC_MAX constants aren't used anywhere, so the
patch removes them.

Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Cc: Matthew Dharm <mdharm-usb@one-eyed-alien.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

include/linux/usb_usual.h

@@ -80,10 +80,9 @@ enum { US_DO_ALL_FLAGS };
 #define US_SC_UFI	0x04		/* Floppy */
 #define US_SC_8070	0x05		/* Removable media */
 #define US_SC_SCSI	0x06		/* Transparent */
-#define US_SC_ISD200    0x07		/* ISD200 ATA */
-#define US_SC_MIN	US_SC_RBC
-#define US_SC_MAX	US_SC_ISD200
+#define US_SC_LOCKABLE	0x07		/* Password-protected */
 
+#define US_SC_ISD200    0xf0		/* ISD200 ATA */
 #define US_SC_DEVICE	0xff		/* Use device's value */
 
 /* Protocols */