Bluetooth: Make is_identity_address a global function

There are more places that can take advantage of is_identity_address()
besides hci_core.c. This patch moves the function to hci_core.h and
gives it the appropriate hci_ prefix.

Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
diff --git a/net/bluetooth/hci_core.c b/net/bluetooth/hci_core.c
index a3cd0bb..1fff3d8 100644
--- a/net/bluetooth/hci_core.c
+++ b/net/bluetooth/hci_core.c
@@ -3412,18 +3412,6 @@
 	return true;
 }
 
-static bool is_identity_address(bdaddr_t *addr, u8 addr_type)
-{
-	if (addr_type == ADDR_LE_DEV_PUBLIC)
-		return true;
-
-	/* Check for Random Static address type */
-	if ((addr->b[5] & 0xc0) == 0xc0)
-		return true;
-
-	return false;
-}
-
 /* This function requires the caller holds hdev->lock */
 struct bdaddr_list *hci_pend_le_conn_lookup(struct hci_dev *hdev,
 					    bdaddr_t *addr, u8 addr_type)
@@ -3504,7 +3492,7 @@
 {
 	struct hci_conn_params *params;
 
-	if (!is_identity_address(addr, addr_type))
+	if (!hci_is_identity_address(addr, addr_type))
 		return NULL;
 
 	params = hci_conn_params_lookup(hdev, addr, addr_type);