Remove hardcoding of numerology in PNF

Fill in the dynamically received numerology, and make the numerology at
the PNF configurable, following the changes in the parent commit.

The change for the reading is somewhat of a hack, because nFAPI, as of
now, does not really foresee to store the numerology, so we fill the
numerology during the start request, when the numerlogy has been
received in the config request, but at that time, the structure for the
time information (frame/slot) does not exist yet.

nfapi/oai_integration/nfapi_pnf.c

@@ -1702,9 +1702,6 @@ int nr_start_request(nfapi_pnf_config_t *config, nfapi_pnf_phy_config_t *phy, nf
     p7_config->timing_info_mode_aperiodic = 1;
   }
 
-	pnf_p7_t* pnf_p7 = (pnf_p7_t*)(p7_config);
-  pnf_p7->mu = 1; /* TODO */
-
   // NR
   p7_config->dl_tti_req_fn = &pnf_phy_dl_tti_req;
   p7_config->ul_tti_req_fn = &pnf_phy_ul_tti_req;
@@ -1759,6 +1756,18 @@ int nr_start_request(nfapi_pnf_config_t *config, nfapi_pnf_phy_config_t *phy, nf
   NFAPI_TRACE(NFAPI_TRACE_INFO, "[PNF] HACK - Set p7_config global ready for subframe ind%s\n", __FUNCTION__);
   p7_config_g = p7_config;
 
+  // Hack? in the config request (which comes before the start request here),
+  // we receive the SCS/mu. The PNF needs that for calculating frame/slot
+  // offsets. However, the memory for the structure which actually keeps track
+  // of the time, is only allocated here, so "pick" the SCS from memory.
+  PHY_VARS_gNB *gNB = RC.gNB[0];
+  DevAssert(gNB != NULL);
+  // check that SCS has actually been received
+  const nfapi_uint8_tlv_t *scs = &gNB->gNB_config.ssb_config.scs_common;
+  DevAssert(scs->tl.tag == NFAPI_NR_CONFIG_SCS_COMMON_TAG);
+  pnf_p7_t* pnf_p7 = (pnf_p7_t*)(p7_config);
+  pnf_p7->mu = scs->value;
+
   // Need to wait for main thread to create RU structures
   while (config_sync_var < 0) {
     usleep(5000000);