Make all methods from PIMagAngChannel virtual

So they can be overloaded

src/sis8300llrfPIMagAngChannel.h

@@ -142,9 +142,9 @@ protected:
 
     virtual ndsStatus writeToHardware();
 //    virtual ndsStatus onEnterDisabled(nds::ChannelStates from, nds::ChannelStates to);
-    ndsStatus updateMagAngRBV();
-    ndsStatus convertTablesToIQ();
-    ndsStatus loadMagAngTables();
+    virtual ndsStatus updateMagAngRBV();
+    virtual ndsStatus convertTablesToIQ();
+    virtual ndsStatus loadMagAngTables();
 };
 
 #endif /* _sis8300llrfPIMagAngChannel_h */