Revert "usb: gadget: mass_storage: added sysfs entry for cdrom to LUNs"

This reverts commit c04291fa5ce281a010adb161067dd757422006bf.
Revert "Disable OS check for the mass storage gadget"

This reverts commit 91acbddb5b9ad438d468bd9299f413991d53c740.
Revert "Removing endeavoru lun_cdrom flag to let ums work rw instead of ro."

This reverts commit fb00ae8ddb4c586a2865983f65e5b0fe89f4287c.