scsi: cxlflash: Remove an unnecessary NULL check

The "cmd" pointer was already dereferenced a couple lines earlier so this
NULL check is too late.  Fortunately, the pointer can never be NULL and the
check can be removed.

Link: https://lore.kernel.org/r/20200605110258.GD978434@mwandaSigned-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

drivers/scsi/cxlflash/main.c

@@ -47,9 +47,6 @@ static void process_cmd_err(struct afu_cmd *cmd, struct scsi_cmnd *scp)
 	struct sisl_ioasa *ioasa;
 	u32 resid;
 
-	if (unlikely(!cmd))
-		return;
-
 	ioasa = &(cmd->sa);
 
 	if (ioasa->rc.flags & SISL_RC_FLAGS_UNDERRUN) {