FROMGIT: scsi: ufs: Simplify ufshcd_comp_scsi_upiu()

ufshcd_comp_scsi_upiu() has one caller and that caller ensures that
lrbp->cmd != NULL. Hence leave out the lrbp->cmd check from
ufshcd_comp_scsi_upiu().

Bug: 306057264
Change-Id: Ic37b0eda0d59c0b7d759a5d352f139cdcffbf163
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
(cherry picked from commit c788cf8a git://git.kernel.org/pub/scm/linux/kernel/git/mkp/scsi.git

 for-next)
Signed-off-by: Bart Van Assche <bvanassche@google.com>