bts: Rename 11bit RACH request counter

This way it fits better the structure where the general one counts all
rachs, and 11bit only the 11 bits. More per-type splitting will be done
in follow-up commits where new types are added.

Change-Id: Ibdfb10dcc65d71e98e2fe8b05001cafea786f071
diff --git a/src/bts.h b/src/bts.h
index d9a86eb..63f80a8 100644
--- a/src/bts.h
+++ b/src/bts.h
@@ -128,7 +128,7 @@
 	CTR_PCH_REQUESTS,
 	CTR_PCH_REQUESTS_TIMEDOUT,
 	CTR_RACH_REQUESTS,
-	CTR_11BIT_RACH_REQUESTS,
+	CTR_RACH_REQUESTS_11BIT,
 	CTR_SPB_UL_FIRST_SEGMENT,
 	CTR_SPB_UL_SECOND_SEGMENT,
 	CTR_SPB_DL_FIRST_SEGMENT,