btmtksdio_mtk_reg_read
err = btmtksdio_mtk_reg_read(hdev, MT7921_PINMUX_0, &val);
err = btmtksdio_mtk_reg_read(hdev, MT7921_PINMUX_1, &val);
err = btmtksdio_mtk_reg_read(hdev, MT7921_PINMUX_1, &val);
err = btmtksdio_mtk_reg_read(hdev, MT7921_BTSYS_RST, &val);
err = btmtksdio_mtk_reg_read(hdev, MT7921_DLSTATUS,
err = btmtksdio_mtk_reg_read(hdev, 0x70010200, &dev_id);
err = btmtksdio_mtk_reg_read(hdev, 0x80021004, &fw_version);