qcacld-3.0: Check if sdio device is valid before start wifi

When loading sdio driver, need make sure sdio device is recognized,
break driver loading if no device.

Change-Id: I4d47575d793b58970012e4e47cc63b0c197f565d
CRs-Fixed: 2245495

core/pld/src/pld_sdio.c

@@ -75,15 +75,16 @@ static int pld_sdio_probe(struct sdio_func *sdio_func,
 			  const struct sdio_device_id *id)
 {
 	struct pld_context *pld_context;
-	struct device *dev = &sdio_func->dev;
-	int ret = 0;
+	struct device *dev;
+	int ret;
 
 	pld_context = pld_get_global_context();
-	if (!pld_context) {
+	if (!pld_context || !sdio_func) {
 		ret = -ENODEV;
 		goto out;
 	}
 
+	dev = &sdio_func->dev;
 	ret = pld_add_dev(pld_context, dev, PLD_BUS_TYPE_SDIO);
 	if (ret)
 		goto out;