enb: add QAM64 support for UL

* add new UE feature
* enable in srsue.conf.templ
* add new table for maximum rates
* add config scenario to enable SIB option for QAM64

Change-Id: I6ac2c9989a761e91b93d76c2507f55f0140b202d
diff --git a/src/osmo_gsm_tester/templates/srsenb_sib.conf.tmpl b/src/osmo_gsm_tester/templates/srsenb_sib.conf.tmpl
index 6d178c6..c738480 100644
--- a/src/osmo_gsm_tester/templates/srsenb_sib.conf.tmpl
+++ b/src/osmo_gsm_tester/templates/srsenb_sib.conf.tmpl
@@ -66,7 +66,7 @@
             n_sb = 1;
             hopping_mode = "inter-subframe";
             pusch_hopping_offset = 2;
-            enable_64_qam = false; // 64QAM PUSCH is not currently enabled
+            enable_64_qam = ${enb.enable_ul_qam64};
             ul_rs =
             {
                 cyclic_shift = 0;