staging: rts5208: remove redundant assignment to retval

Variable retval is initialized to a value that is never read and it
is re-assigned later. The initialization is redundant and can be
removed.

Addresses-Coverity: ("Unused value")
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Link: https://lore.kernel.org/r/20190818184649.13828-1-colin.king@canonical.comSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/rts5208/ms.c

@@ -3842,7 +3842,7 @@ int mg_set_leaf_id(struct scsi_cmnd *srb, struct rtsx_chip *chip)
 
 int mg_get_local_EKB(struct scsi_cmnd *srb, struct rtsx_chip *chip)
 {
-	int retval = STATUS_FAIL;
+	int retval;
 	int bufflen;
 	unsigned int lun = SCSI_LUN(srb);
 	u8 *buf = NULL;