mt76: mt7615: store N9 firmware version instead of CR4

CR4 is used very little, N9 is the main firmware that the driver interacts with
Signed-off-by: Felix Fietkau <nbd@nbd.name>

drivers/net/wireless/mediatek/mt76/mt7615/mcu.c

@@ -491,6 +491,10 @@ static int mt7615_load_n9(struct mt7615_dev *dev, const char *name)
 		goto out;
 	}
 
+	snprintf(dev->mt76.hw->wiphy->fw_version,
+		 sizeof(dev->mt76.hw->wiphy->fw_version),
+		 "%.10s-%.15s", hdr->fw_ver, hdr->build_date);
+
 out:
 	release_firmware(fw);
 	return ret;
@@ -528,10 +532,6 @@ static int mt7615_load_cr4(struct mt7615_dev *dev, const char *name)
 		goto out;
 	}
 
-	snprintf(dev->mt76.hw->wiphy->fw_version,
-		 sizeof(dev->mt76.hw->wiphy->fw_version),
-		 "%.10s-%.15s", hdr->fw_ver, hdr->build_date);
-
 out:
 	release_firmware(fw);