gsmtap: The TETRA_AACH was defined twice, remove one, renumber

The GSMTAP_TETRA_AACH was defined twice. On the tetra list we
decided to remove the second entry and renumber the list as no
one is using this yet.
diff --git a/include/osmocore/gsmtap.h b/include/osmocore/gsmtap.h
index 3f911e6..236b25a 100644
--- a/include/osmocore/gsmtap.h
+++ b/include/osmocore/gsmtap.h
@@ -52,13 +52,12 @@
 /* sub-types for TYPE_TETRA_AIR */
 #define GSMTAP_TETRA_BSCH	0x01
 #define GSMTAP_TETRA_AACH	0x02
-#define GSMTAP_TETRA_AACH	0x03
-#define GSMTAP_TETRA_SCH_HU	0x04
-#define GSMTAP_TETRA_SCH_HD	0x05
-#define GSMTAP_TETRA_SCH_F	0x06
-#define GSMTAP_TETRA_BNCH	0x07
-#define GSMTAP_TETRA_STCH	0x08
-#define GSMTAP_TETRA_TCH_F	0x09
+#define GSMTAP_TETRA_SCH_HU	0x03
+#define GSMTAP_TETRA_SCH_HD	0x04
+#define GSMTAP_TETRA_SCH_F	0x05
+#define GSMTAP_TETRA_BNCH	0x06
+#define GSMTAP_TETRA_STCH	0x07
+#define GSMTAP_TETRA_TCH_F	0x08
 
 /* flags for the ARFCN */
 #define GSMTAP_ARFCN_F_PCS	0x8000