Updates kvmx: 8d1967a Adds config_unset action

diff --git a/kvmx b/kvmx
index 684ca29524749320e0dfa0aa331bf105e2e5379f..8d1967a3f3af633ec41f36938f4e2549e91f12d7 160000 (submodule)
--- a/kvmx
+++ b/kvmx
@@ -1 +1 @@
-Subproject commit 684ca29524749320e0dfa0aa331bf105e2e5379f
+Subproject commit 8d1967a3f3af633ec41f36938f4e2549e91f12d7