Add ASCI (advanced speech call items) log sub-system

As we subsequently add ASCI related features to the code, it makes
sense to have a specific log sub-system for it.

Change-Id: I8ea3e61df35175bd74110b2f41994c99da3e2858
Related: OS#4851

include/osmo-bts/logging.h

@@ -21,6 +21,7 @@ enum {
 	DABIS,
 	DRTP,
 	DOSMUX,
+	DASCI,
 };
 
 extern const struct log_info bts_log_info;

src/common/logging.c

@@ -125,6 +125,13 @@ static struct log_info_cat bts_log_info_cat[] = {
 		.loglevel = LOGL_NOTICE,
 		.enabled = 1,
 	},
+	[DASCI] = {
+		.name = "DASCI",
+		.description = "ASCI (Advanced Speech Call Items: VGCS/VBS)",
+		.loglevel = LOGL_NOTICE,
+		.enabled = 1,
+	},
+
 };
 
 static int osmo_bts_filter_fn(const struct log_context *ctx, struct log_target *tgt)