phosphor-networkd-rev.bbclass: bump version

Change-Id: I5a9f2d8a7fdc37fe65d9bd3408162fb5f88db372
Signed-off-by: Andrew Geissler <geissonator@yahoo.com>
diff --git a/classes/phosphor-networkd-rev.bbclass b/classes/phosphor-networkd-rev.bbclass
index 3a866b8..ad63b9b 100644
--- a/classes/phosphor-networkd-rev.bbclass
+++ b/classes/phosphor-networkd-rev.bbclass
@@ -1,2 +1,2 @@
 SRC_URI += "git://github.com/openbmc/phosphor-networkd"
-SRCREV = "90480c46bbc9f8c9fddcc6296ea6d8a728f276b7"
+SRCREV = "ad21fc2a868122aee973ed5d4f1c652ec2749533"