HACK: bluetooth: hci_bcm: Sleep explicite after power up

The driver relies on the fact that CTS signalize the availability
of the chip. Since the RPi 3 doesn't have any hardware flow-control
the driver sends data too soon. So avoid a possible data loss by
sleeping until the chip came up.

Signed-off-by: Stefan Wahren <stefan.wahren@i2se.com>

drivers/bluetooth/hci_bcm.c

@@ -227,6 +227,11 @@ static int bcm_gpio_set_power(struct bcm_device *dev, bool powered)
 
 	dev->clk_enabled = powered;
 
+	if (powered) {
+		/* Don't rely on CTS and wait until chip came up */
+		msleep(15);
+	}
+
 	return 0;
 
 err_revert_shutdown: