fix typo CHANNL->CHANNEL

diff --git a/src/abis_nm.c b/src/abis_nm.c
index cd1f444..74dba23 100644
--- a/src/abis_nm.c
+++ b/src/abis_nm.c
@@ -447,7 +447,7 @@
 	case NM_OC_BASEB_TRANSC:
 		return "BASEBAND TRANSCEIVER";
 	case NM_OC_CHANNEL:
-		return "CHANNL";
+		return "CHANNEL";
 	case NM_OC_BS11_ADJC:
 		return "ADJC";
 	case NM_OC_BS11_HANDOVER: