mboxd.bb: bump version

Change-Id: I2cf986b7c69e7b597b96198a1b94cf34032f0920
Signed-off-by: Andrew Geissler <geissonator@yahoo.com>
diff --git a/common/recipes-phosphor/mboxd/mboxd.bb b/common/recipes-phosphor/mboxd/mboxd.bb
index d339ba0..9476f6c 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="0971299fc65fa2a09428a19bab629da0ebe9f724"
+SRCREV="974507e3e35ae937d6a2d6315f8b06873715bf17"
 
 PROVIDES += "mboxctl"