usb:composite: USB Mass Storage - storage_common.c from Linux kernel

usb:composite: USB Mass Storage - storage_common.c from Linux kernel

The storage_common.c source file from v2.6.36 Linux kernel.

commit d26a6aa08b9f12b44fb1ee65625e7480d3d5bb81
Author: Michal Nazarewicz <[email protected]>
Date:   Mon Nov 9 14:15:23 2009 +0100

USB: g_mass_storage: code cleaned up and comments updated

Signed-off-by: Lukasz Majewski <[email protected]>
Signed-off-by: Andrzej Pietrasiewicz <[email protected]>
Signed-off-by: Kyungmin Park <[email protected]>
CC: Marek Vasut <[email protected]>