scsi: ufs: ufs-qcom: Remove impossible check

The "dev_req_params" pointer points to inside the middle of a struct so it
can't be NULL.  Removing this impossible condition is nice because now we
don't need to consider the correct error code for that situation.

Link: https://lore.kernel.org/r/Y/yA3niWUcGYgBU8@kili


Fixes: f06fcc71 ("scsi: ufs-qcom: add QUniPro hardware support and power optimizations")
Signed-off-by: Dan Carpenter <error27@gmail.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>