wil6210: fix wil_vring_init_tx status

In case vring setup with the firmware failed,
success status was returned. fix it.

Signed-off-by: Vladimir Kondratiev <qca_vkondrat@qca.qualcomm.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/drivers/net/wireless/ath/wil6210/txrx.c b/drivers/net/wireless/ath/wil6210/txrx.c
index 1985951..64b971f 100644
--- a/drivers/net/wireless/ath/wil6210/txrx.c
+++ b/drivers/net/wireless/ath/wil6210/txrx.c
@@ -565,6 +565,7 @@
 	if (reply.cmd.status != WMI_VRING_CFG_SUCCESS) {
 		wil_err(wil, "Tx config failed, status 0x%02x\n",
 			reply.cmd.status);
+		rc = -EINVAL;
 		goto out_free;
 	}
 	vring->hwtail = le32_to_cpu(reply.cmd.tx_vring_tail_ptr);