mmc: dw_mmc: fix the wrong condition checking

When num-slots is lower than 1, it's right that should be returned -ENODEV.
Signed-off-by: Jaehoon Chung <jh80.chung@samsung.com>

drivers/mmc/host/dw_mmc.c

@@ -2760,7 +2760,7 @@ int dw_mci_probe(struct dw_mci *host)
 		}
 	}
 
-	if (host->pdata->num_slots > 1) {
+	if (host->pdata->num_slots < 1) {
 		dev_err(host->dev,
 			"Platform data must supply num_slots.\n");
 		return -ENODEV;