Add secure param to mgmt_ev_pin_code_request

Update mgmt interface with secure param in PIN code request event which
is part of secure PIN requirement implementation.
diff --git a/doc/mgmt-api.txt b/doc/mgmt-api.txt
index 925b5ad..45f6a64 100644
--- a/doc/mgmt-api.txt
+++ b/doc/mgmt-api.txt
@@ -482,6 +482,7 @@
 Event Code		0x000E
 Controller Index:	<controller id>
 Event Parameters	Address (6 Octets)
+			Secure (1 Octet)
 
 
 User Confirmation Request Event
diff --git a/lib/mgmt.h b/lib/mgmt.h
index 22979d9..57e7603 100644
--- a/lib/mgmt.h
+++ b/lib/mgmt.h
@@ -259,6 +259,7 @@
 #define MGMT_EV_PIN_CODE_REQUEST	0x000E
 struct mgmt_ev_pin_code_request {
 	bdaddr_t bdaddr;
+	uint8_t secure;
 } __packed;
 
 #define MGMT_EV_USER_CONFIRM_REQUEST	0x000F