Bluetooth: hci_intel: Fix warnings due to unused lpm functions

intel_lpm_suspend/resume are only used in case of CONFIG_PM.

Signed-off-by: Loic Poulain <loic.poulain@intel.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
diff --git a/drivers/bluetooth/hci_intel.c b/drivers/bluetooth/hci_intel.c
index b4dc3c5..215e8e9 100644
--- a/drivers/bluetooth/hci_intel.c
+++ b/drivers/bluetooth/hci_intel.c
@@ -141,6 +141,7 @@
 	return err;
 }
 
+#ifdef CONFIG_PM
 static int intel_wait_lpm_transaction(struct hci_uart *hu)
 {
 	struct intel_data *intel = hu->priv;
@@ -249,6 +250,7 @@
 
 	return 0;
 }
+#endif /* CONFIG_PM */
 
 static int intel_lpm_host_wake(struct hci_uart *hu)
 {