ofproto-dpif-upcall: Fix redundant mirror on geneve tunnel options.

The cited commit fixed missing mirror packets by reset mirror when
packets are modified but setting geneve options was also treated as
a modified packet but should be treated as a part of set_tunnel
which doesn't reset mirror.

Fixes: feed7f6 ("ofproto-dpif-upcall: Mirror packets that are modified.")
Acked-by: Simon Horman <horms@ovn.org>
Signed-off-by: Roi Dayan <roid@nvidia.com>
Signed-off-by: Eelco Chaudron <echaudro@redhat.com>
Signed-off-by: Simon Horman <horms@ovn.org>

ofproto/ofproto-dpif-xlate.c

@@ -7101,7 +7101,7 @@ reset_mirror_ctx(struct xlate_ctx *ctx, const struct flow *flow,
 
         set_field = ofpact_get_SET_FIELD(a);
         mf = set_field->field;
-        if (mf_are_prereqs_ok(mf, flow, NULL)) {
+        if (mf_are_prereqs_ok(mf, flow, NULL) && !mf_is_tun_metadata(mf)) {
             ctx->mirrors = 0;
         }
         return;