BSSGP/LLC: Fix LLCC SAPI for SM

While in TS 24.007 there is a separate L3 SAPI for GMM and SM,
this only applies to messages sent over LAPDm, and not LLC.

In LLC, both GMM and SM are sent via the same LLGMM LLC-SAPI.

Change-Id: I7814c952cd7f6032222b190d396aaa0570571bfc
diff --git a/library/BSSGP_Emulation.ttcn b/library/BSSGP_Emulation.ttcn
index fb3f7d4..1ced242 100644
--- a/library/BSSGP_Emulation.ttcn
+++ b/library/BSSGP_Emulation.ttcn
@@ -562,7 +562,7 @@
 	if (ischosen(l3_mo.msgs.gprs_mm)) {
 		return c_LLC_SAPI_LLGMM;
 	} else if (ischosen(l3_mo.msgs.gprs_sm)) {
-		return c_LLC_SAPI_LLSM;
+		return c_LLC_SAPI_LLGMM;
 	} else if (ischosen(l3_mo.msgs.sms)) {
 		return c_LLC_SAPI_LLSMS;
 	}
@@ -574,7 +574,7 @@
 	if (ischosen(l3_mt.msgs.gprs_mm)) {
 		return c_LLC_SAPI_LLGMM;
 	} else if (ischosen(l3_mt.msgs.gprs_sm)) {
-		return c_LLC_SAPI_LLSM;
+		return c_LLC_SAPI_LLGMM;
 	} else if (ischosen(l3_mt.msgs.sms)) {
 		return c_LLC_SAPI_LLSMS;
 	}