[qca-nss-sfe] add support for outer IPv6 rule for MAP-E

Support rule creation and handling of MAP-E flow acceleration.

Signed-off-by: Tian Yang <quic_tiany@quicinc.com>
Change-Id: I699ee900236f9c2b897adae57bf2ec957eec6fc4
diff --git a/sfe.c b/sfe.c
index 1cb88a2..c9e5c86 100644
--- a/sfe.c
+++ b/sfe.c
@@ -908,6 +908,9 @@
 	case IPPROTO_UDP:
 		break;
 
+	case IPPROTO_IPIP:
+		break;
+
 	default:
 		ret = SFE_CMN_RESPONSE_EMSG;
 		sfe_incr_exceptions(SFE_EXCEPTION_PROTOCOL_NOT_SUPPORT);