Bluetooth: mt7921s: fix bus hang with wrong privilege

According to chip hw flow, mt7921s need to re-acquire privilege
again before normal running. Otherwise, the bus may be stuck in
an abnormal status.

Fixes: c603bf1f ("Bluetooth: btmtksdio: add MT7921s Bluetooth support")
Co-developed-by: Sean Wang <sean.wang@mediatek.com>
Signed-off-by: Sean Wang <sean.wang@mediatek.com>
Signed-off-by: Mark Chen <mark-yw.chen@mediatek.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>

drivers/bluetooth/btmtksdio.c

@@ -960,6 +960,14 @@ static int btmtksdio_setup(struct hci_dev *hdev)
 		if (err < 0)
 			return err;
 
+		err = btmtksdio_fw_pmctrl(bdev);
+		if (err < 0)
+			return err;
+
+		err = btmtksdio_drv_pmctrl(bdev);
+		if (err < 0)
+			return err;
+
 		/* Enable SCO over I2S/PCM */
 		err = btmtksdio_sco_setting(hdev);
 		if (err < 0) {