Remove threequarter_fs, log_level; make functions static

2 functions with same name as static to make it clearer they are separate.

remove unused copy of log_level global var.

remove threequarter sampling variable from the radio board general
configuration. The decision of sampling rate is made above. A better
behavior can be done later, like ask to the radio board what sampling
rate it can do,then use it to decide the appropiate sampling rate from
the gNB configuration. In UE case, it is another issue, as the sampling
rate would change after we decode SIB1, but also it is not developped
yet.

executables/lte-uesoftmodem.c

@@ -384,7 +384,8 @@ void set_default_frame_parms(LTE_DL_FRAME_PARMS *frame_parms[MAX_NUM_CCs]) {
   }
 }
 
-void init_openair0(LTE_DL_FRAME_PARMS *frame_parms,int rxgain) {
+static void init_openair0(LTE_DL_FRAME_PARMS *frame_parms, int rxgain)
+{
   int card;
   int i;