lchan_fsm: add missing header file.
The symbol GSM0808_SC_CFG_AMR_4_75_5_90_7_40_12_20 is used in
lchan_fsm.c, but gsm_08_08.h, where the symbol is declared is not
included.
Change-Id: I46f910b3e0f2c7d8c78c1681acef30b9419e39f0
diff --git a/src/osmo-bsc/lchan_fsm.c b/src/osmo-bsc/lchan_fsm.c
index 7cbba44..2b7dc97 100644
--- a/src/osmo-bsc/lchan_fsm.c
+++ b/src/osmo-bsc/lchan_fsm.c
@@ -22,6 +22,7 @@
#include <osmocom/gsm/rsl.h>
#include <osmocom/core/byteswap.h>
+#include <osmocom/gsm/protocol/gsm_08_08.h>
#include <osmocom/bsc/debug.h>
#include <osmocom/bsc/lchan_fsm.h>