rsi: Handle usb multi-byte write failure case properly

In function usb_write_register_multiple, if any intermediate block transfer
is failed, further operations should be terminated. 'else' is removed, as
there is no significance for it after return.
Signed-off-by: Prameela Rani Garnepudi <prameela.j04cs@gmail.com>
Signed-off-by: Amitkumar Karwar <amit.karwar@redpinesignals.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>

drivers/net/wireless/rsi/rsi_91x_usb.c

@@ -316,12 +316,13 @@ int rsi_usb_write_register_multiple(struct rsi_hw *adapter,
 			rsi_dbg(ERR_ZONE,
 				"Reg write failed with error code :%d\n",
 				status);
-		} else {
+			kfree(buf);
+			return status;
+		}
 		count -= transfer;
 		data += transfer;
 		addr += transfer;
 	}
-	}
 
 	kfree(buf);
 	return 0;