Return BLK_STS_NOTSUPP and blk_status_t from blk_cloned_rq_check_limits()

[Ritika Srivastava <ritika.srivastava@xxxxxxxxxx>]

Hi,
These patches address the comments from previous v1 version
block: return BLK_STS_NOTSUPP if operation is not supported

Updates since v1:
- Document scenario and SCSI error encountered in a comment in blk_cloned_rq_check_limits().
- Add a patch to switch returning errno codes to blk_status_t in blk_cloned_rq_check_limits().

Please review the following patches.
[PATCH 1/2] block: Return blk_status_t instead of errno codes
[PATCH v2 2/2] block: return BLK_STS_NOTSUPP if operation is not supported

Thanks,
Ritika