ath10k: else is not generally useful after a break or return

Fixes checkpatch warnings:

WARNING: else is not generally useful after a break or return

Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>
diff --git a/drivers/net/wireless/ath/ath10k/pci.c b/drivers/net/wireless/ath/ath10k/pci.c
index 08e88a3..abd0a68 100644
--- a/drivers/net/wireless/ath/ath10k/pci.c
+++ b/drivers/net/wireless/ath/ath10k/pci.c
@@ -362,10 +362,11 @@
 
 	if (ar_pci->num_msi_intrs > 1)
 		return "msi-x";
-	else if (ar_pci->num_msi_intrs == 1)
+
+	if (ar_pci->num_msi_intrs == 1)
 		return "msi";
-	else
-		return "legacy";
+
+	return "legacy";
 }
 
 static int __ath10k_pci_rx_post_buf(struct ath10k_pci_pipe *pipe)