Bluetooth: btintel_pcie: Define hdev->wakeup() callback

Implement hdev->wakeup() callback to support Wake On BT feature.

Test steps:
1. echo enabled > /sys/bus/pci/devices/0000:00:14.7/power/wakeup
2. connect bluetooth hid device
3. put the system to suspend - rtcwake -m mem -s 300
4. press any key on hid to wake up the system

Signed-off-by: Kiran K <[e-mail]>
Signed-off-by: Chandrashekar Devegowda <[e-mail]>
Signed-off-by: Luiz Augusto von Dentz <[e-mail]>

drivers/bluetooth/btintel_pcie.c

···
 	btintel_pcie_reset(hdev);
 }
 
+static bool btintel_pcie_wakeup(struct hci_dev *hdev)
+{
+	struct btintel_pcie_data *data = hci_get_drvdata(hdev);
+
+	return device_may_wakeup(&data->pdev->dev);
+}
+
 static int btintel_pcie_setup_hdev(struct btintel_pcie_data *data)
 {
 	int err;
···
 	hdev->set_diag = btintel_set_diag;
 	hdev->set_bdaddr = btintel_set_bdaddr;
 	hdev->reset = btintel_pcie_reset;
+	hdev->wakeup = btintel_pcie_wakeup;
 
 	err = hci_register_dev(hdev);
 	if (err < 0) {