mhvtl.spec: Update for 1.4-8_release

- Add additional fields in MAM for preperation of multi-partition support
- MODE SELECT fixes
- Solaris 11.1 st mode select
- Make virtual media more resilient against disk full conditions
- Add additional error checking between kernel and userspace ioctl
- Add ability to introduce delays in load/unload/position/thread/rewind op codes
- Add 16byte CDB locate command support
- Minor kernel module tweeks - increase timeout & error checking on ioctl()

Signed-off-by: Mark Harvey <markh794@gmail.com>