UAPI: scsi: move ioctl related information

The ioctl information should be in header files that expose it
to userspace.

Change-Id: Iabf1e53a1357c2ce22ecdc8dc0270377759effc8
Signed-off-by: Krishna Konda <kkonda@codeaurora.org>
Signed-off-by: Abhimanyu Kapur <abhimany@codeaurora.org>
Signed-off-by: Subhash Jadavani <subhashj@codeaurora.org>