[GPRS] introudce PDCH and PDCH/TCH physical channels

GPRS needs PDCH (Packet Data Channels), and we need support in
our data model as well as OML and RSL for it
diff --git a/openbsc/src/abis_nm.c b/openbsc/src/abis_nm.c
index e00e569..03d9def 100755
--- a/openbsc/src/abis_nm.c
+++ b/openbsc/src/abis_nm.c
@@ -410,6 +410,8 @@
 	[GSM_PCHAN_TCH_F]	= NM_CHANC_TCHFull,
 	[GSM_PCHAN_TCH_H]	= NM_CHANC_TCHHalf,
 	[GSM_PCHAN_SDCCH8_SACCH8C] = NM_CHANC_SDCCH,
+	[GSM_PCHAN_PDCH]	= NM_CHANC_IPAC_PDCH,
+	[GSM_PCHAN_TCH_F_PDCH]	= NM_CHANC_IPAC_TCHFull_PDCH,
 	/* FIXME: bounds check */
 };