mboxd.bb: bump version

Change-Id: I28c430cdd7e846d9416ff82ff729cf6df1b427f8
Signed-off-by: Patrick Williams <patrick@stwcx.xyz>
diff --git a/common/recipes-phosphor/mboxd/mboxd.bb b/common/recipes-phosphor/mboxd/mboxd.bb
index 66a80df..fdfb76c 100644
--- a/common/recipes-phosphor/mboxd/mboxd.bb
+++ b/common/recipes-phosphor/mboxd/mboxd.bb
@@ -20,7 +20,7 @@
 SRC_URI += "file://99-aspeed-lpc-ctrl.rules"
 SRC_URI += "file://aspeed-lpc-ctrl-h.patch"
 
-SRCREV="1e1bdc75b52fd403026da68b3404865bb13218db"
+SRCREV="6e6aa3a9e20fd43935acaf5679553ff8fcbcd6c7"
 
 PROVIDES += "mboxctl"