gsm0808: implement BSSMAP Classmark Request

Related: OS#3043
Change-Id: I4a2e1d3923e33912579c4180aa1ff8e8f5abb7e7
diff --git a/src/gsm/libosmogsm.map b/src/gsm/libosmogsm.map
index 60d6ed8..0c40c88 100644
--- a/src/gsm/libosmogsm.map
+++ b/src/gsm/libosmogsm.map
@@ -156,6 +156,7 @@
 gsm0808_create_cipher;
 gsm0808_create_cipher_complete;
 gsm0808_create_cipher_reject;
+gsm0808_create_classmark_request;
 gsm0808_create_classmark_update;
 gsm0808_create_clear_command;
 gsm0808_create_clear_complete;