revert commit b400dd8f646a69f7fe0013065fa9b4711f60a45e regarding NECI=0

As it turns out, we start to allocate SDCCH for voice calls.  Since we
don't yet implement switching from SDCCH to TCH during call setup,
this leads to various problems.
diff --git a/openbsc/src/gsm_04_08.c b/openbsc/src/gsm_04_08.c
index 64405ec..967e4ce 100644
--- a/openbsc/src/gsm_04_08.c
+++ b/openbsc/src/gsm_04_08.c
@@ -3755,10 +3755,10 @@
 enum gsm_chan_t get_ctype_by_chreq(struct gsm_bts *bts, u_int8_t ra)
 {
 	int i;
-	/* FIXME: determine if we set NECI = 1 in the BTS SI4 */
+	/* FIXME: determine if we set NECI = 0 in the BTS SI4 */
 
-	for (i = 0; i < ARRAY_SIZE(chreq_type_neci1); i++) {
-		const struct chreq *chr = &chreq_type_neci1[i];
+	for (i = 0; i < ARRAY_SIZE(chreq_type_neci0); i++) {
+		const struct chreq *chr = &chreq_type_neci0[i];
 		if ((ra & chr->mask) == chr->val)
 			return ctype_by_chreq[chr->type];
 	}
@@ -3769,10 +3769,10 @@
 enum gsm_chreq_reason_t get_reason_by_chreq(struct gsm_bts *bts, u_int8_t ra)
 {
 	int i;
-	/* FIXME: determine if we set NECI = 1 in the BTS SI4 */
+	/* FIXME: determine if we set NECI = 0 in the BTS SI4 */
 
-	for (i = 0; i < ARRAY_SIZE(chreq_type_neci1); i++) {
-		const struct chreq *chr = &chreq_type_neci1[i];
+	for (i = 0; i < ARRAY_SIZE(chreq_type_neci0); i++) {
+		const struct chreq *chr = &chreq_type_neci0[i];
 		if ((ra & chr->mask) == chr->val)
 			return reason_by_chreq[chr->type];
 	}