libs2: SWPROT-9320: Store NLS status of primary/secondary controller in controller's NVM (SiliconLabsSoftware#52)

(cherry picked from commit d925294748422d314bf58b9d8e67d04efab3aa97)
Relate-to: SiliconLabsSoftware#50
Forwarded: SiliconLabsSoftware#52
Signed-off-by: Philippe Coval <philippe.coval@silabs.com>

Author: silabs-aydogane

applications/zpc/components/zwave/zwave_transports/s2/libs/zw-libs2/include/S2_external.h

@@ -193,6 +193,14 @@ void S2_resynchronization_event(
  */
 void S2_save_nls_state(void);
 
+/**
+ * Load NLS state stored in device memory in S2 context
+ *
+ * \param ctxt the S2 context
+ * \param nls_state NLS state
+ */
+void S2_load_nls_state(struct S2* ctxt, uint8_t nls_state);
+
 /**
  * @}
  */

applications/zpc/components/zwave/zwave_transports/s2/libs/zw-libs2/protocol/S2.c

@@ -1459,6 +1459,7 @@ static void S2_command_handler(struct S2* p_context, s2_connection_t* src, uint8
           if (state) {
             ctxt->nls_state = 1; // There is at least one an NLS-enabled node in the network
           }
+          S2_save_nls_state();
 
           S2_notify_nls_state_report(src->r_node, src->class_id, capability, state);
         }
@@ -1968,6 +1969,12 @@ S2_is_send_data_multicast_busy(struct S2* p_context)
   return ctxt->fsm != IDLE;
 }
 
+void S2_load_nls_state(struct S2* p_context, uint8_t nls_state)
+{
+  CTX_DEF
+  ctxt->nls_state = nls_state;
+}
+
 static void S2_send_nls_state_report(struct S2* p_context, s2_connection_t* con)
 {
   CTX_DEF