scsi: ufs: remove redundant "Illegal ufs-IOCTL" log for BLKROSET command

This patch prevents the "ufshcd_ioctl: Illegal ufs-IOCTL cmd 4701" log
message from being printed during boot time.
4701(BLKROSET) is not supported but not an Illegal command to UFS.

CRs-fixed: 580449

Change-Id: I20d54b23c09bd8b72b671b979103424e2050e15f
Signed-off-by: Noa Rubens <noag@codeaurora.org>