Suppress any CellGroupConfig updates in F1

The CellGroupConfig should come from the DU. Currently, any update made
to the CellGroupConfig is done at CU. In split-operation, we have no way
of telling the DU about this update. Hence, in this commit, check if we
are in F1 split mode operation during a CellGroupConfig update, and if
so, suppress any updates to the CellGroupConfig, alongside a warning.

openair2/RRC/NR/nr_rrc_config.c

@@ -2326,6 +2326,8 @@ NR_CellGroupConfig_t *get_initial_cellGroupConfig(int uid,
   return cellGroupConfig;
 }
 
+#include "common/ran_context.h"
+#include "nr_rrc_defs.h"
 void update_cellGroupConfig(NR_CellGroupConfig_t *cellGroupConfig,
                             const int uid,
                             NR_UE_NR_Capability_t *uecap,
@@ -2341,6 +2343,13 @@ void update_cellGroupConfig(NR_CellGroupConfig_t *cellGroupConfig,
     return;
   DevAssert(configuration->scc != NULL);
 
+  /* This is a hack and will be removed once the CellGroupConfig is fully
+   * handled at the DU */
+  if (NODE_IS_CU(RC.nrrrc[0]->node_type)) {
+    LOG_W(RRC, "update of CellGroupConfig not yet supported in F1\n");
+    return;
+  }
+
   NR_SpCellConfig_t *SpCellConfig = cellGroupConfig->spCellConfig;
   NR_ServingCellConfigCommon_t *scc = configuration->scc;