vty: Add 'show bts pdch' command

This allows to see which channels have been enabled according to PCU.

Change-Id: If72e67ba80aab4e0c68408e6996d74d2ff70c322
diff --git a/src/pcu_vty_functions.h b/src/pcu_vty_functions.h
index 6fbc366..4528fb2 100644
--- a/src/pcu_vty_functions.h
+++ b/src/pcu_vty_functions.h
@@ -33,7 +33,7 @@
 	uint32_t tlli);
 int pcu_vty_show_ms_by_imsi(struct vty *vty, struct gprs_rlcmac_bts *bts_data,
 	const char *imsi);
-
+int pcu_vty_show_bts_pdch(struct vty *vty, const struct gprs_rlcmac_bts *bts_data);
 #ifdef __cplusplus
 }
 #endif