subsys: Fix config enums in ctr_lrw, omit empty enums values in ctr_config help

Author: hubmartin

subsys/ctr_config/ctr_config.c

@@ -202,7 +202,9 @@ int ctr_config_help_item(const struct shell *shell, const struct ctr_config_item
 	case CTR_CONFIG_TYPE_ENUM:
 		shell_print(shell, "  %-18s:%s", item->name, item->help);
 		for (int i = 0; i < item->max; i++) {
-			shell_print(shell, "                     - %s", item->enums[i]);
+			if (strlen(item->enums[i])) {
+				shell_print(shell, "                     - %s", item->enums[i]);
+			}
 		}
 		break;
 	case CTR_CONFIG_TYPE_STRING:

subsys/ctr_lrw/ctr_lrw.c

@@ -145,9 +145,9 @@ static struct config m_config;
 
 static const char *m_enum_antenna_items[] = {"int", "ext"};
 static const char *m_enum_band_items[] = {
-	"AS923", "AU915", "EU868", "KR920", "IN865", "US915",
+	"AS923", "AU915", "", "", "", "EU868", "KR920", "IN865", "US915",
 };
-static const char *m_enum_class_items[] = {"A", "C"};
+static const char *m_enum_class_items[] = {"A", "", "C"};
 static const char *m_enum_mode_items[] = {"apb", "otaa"};
 static const char *m_enum_nwk_items[] = {"private", "public"};