pdch/tbf: Move gprs_rlcmac_rcv_data_block_acknowledged into the pdch

Move the method into the PDCH. Extract the finding of TLLI into a
new class called Decoding. Move the assemble and forward LLC frames
into the TBF as it is poking in the internals of the TBF.
diff --git a/src/rlc.h b/src/rlc.h
new file mode 100644
index 0000000..df10ec3
--- /dev/null
+++ b/src/rlc.h
@@ -0,0 +1,56 @@
+/* rlc header descriptions
+ *
+ * Copyright (C) 2012 Ivan Klyuchnikov
+ * Copyright (C) 2012 Andreas Eversberg <jolly@eversberg.eu>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
+ */
+#pragma once
+
+#include <stdint.h>
+
+extern "C" {
+/* TS 04.60  10.2.2 */
+struct rlc_ul_header {
+	uint8_t	r:1,
+		 si:1,
+		 cv:4,
+		 pt:2;
+	uint8_t	ti:1,
+		 tfi:5,
+		 pi:1,
+		 spare:1;
+	uint8_t	e:1,
+		 bsn:7;
+} __attribute__ ((packed));
+
+struct rlc_dl_header {
+	uint8_t	usf:3,
+		 s_p:1,
+		 rrbp:2,
+		 pt:2;
+	uint8_t	fbi:1,
+		 tfi:5,
+		 pr:2;
+	uint8_t	e:1,
+		 bsn:7;
+} __attribute__ ((packed));
+
+struct rlc_li_field {
+	uint8_t	e:1,
+		 m:1,
+		 li:6;
+} __attribute__ ((packed));
+}