Make gpd config utility global

Make gpd a global utility macro for reading config/command line parameters.
Add a corresponding function with full name for clarity, keep the short name
for the macro for backward compatibility and ease of use.

The main benefit of gpd/config_get_paramdef_from_name macro/function is that
it does not require maintaining a separate parameter index list.

radio/fhi_72/mplane/init-mplane.c

@@ -72,14 +72,6 @@ static void ly_print_clb(LY_LOG_LEVEL level, const char *msg, const char *path)
   }
 }
 
-static const paramdef_t *gpd(const paramdef_t *pd, int num, const char *name)
-{
-  /* the config module does not know const-correctness... */
-  int idx = config_paramidx_fromname((paramdef_t *)pd, num, (char *)name);
-  DevAssert(idx >= 0);
-  return &pd[idx];
-}
-
 bool init_mplane(ru_session_list_t *ru_session_list)
 {
   paramdef_t fhip[] = ORAN_GLOBALPARAMS_DESC;

radio/fhi_72/oran-config.c

@@ -440,14 +440,6 @@ void print_fh_config(const struct xran_fh_config *fh_config)
 #endif
 }
 
-static const paramdef_t *gpd(const paramdef_t *pd, int num, const char *name)
-{
-  /* the config module does not know const-correctness... */
-  int idx = config_paramidx_fromname((paramdef_t *)pd, num, (char *)name);
-  DevAssert(idx >= 0);
-  return &pd[idx];
-}
-
 static uint64_t get_u64_mask(const paramdef_t *pd)
 {
   DevAssert(pd != NULL);