scsi: Add reset ioctl capability to ULDs

scsi: Add reset ioctl capability to ULDs

Currently, the only way to issue a SCSI reset of any
type is to use the sg device.  By adding extra ioctls
to scsi_ioctl.c we enable this for all ULDs.

The slight complication is that scsi_ioctl() is usually
only called when the device has been checked not to be
undergoing eh recovery.  Resets may be issued in
this scenario if the user opens the device O_NONBLOCK.

Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>