Add LWM2M_LEGATO_WAKEUP to the app model

Secured SMS Wake-Up is implemented on both AV server and Legato
sides; to enable the GUI button on the server, new entry
must be added to the application model.

Resolves: LE-11658
Change-Id: Ia28f6ef7f6d0b862fc5113dd69285c33e9ec3ab3

models/model.app

@@ -17,6 +17,7 @@
             <action impl="LWM2M_OBSERVE"/>
             <action impl="LWM2M_CONFIGURE_HEARTBEAT"/>
             <action impl="LWM2M_AIRPRIME_BUNDLE_INSTALL"/>
+            <action impl="LWM2M_LEGATO_WAKEUP" config="secure"/>
         </dm>
         <include>
             <file name="oma.cp"/>