meta-google: mstpd: Lower log level

The current log level is too noisy and polluting the journal with lots
of unhelpful debugging messages. Drop the level down to 2 in order to
only produce error messages.

Change-Id: I9d892b80e0d1ba7516614944c4ad74502c6c1aad
Signed-off-by: William A. Kennington III <wak@google.com>
diff --git a/meta-google/recipes-extended/networking/files/mstpd.service b/meta-google/recipes-extended/networking/files/mstpd.service
index ef83034..a7b1fc8 100644
--- a/meta-google/recipes-extended/networking/files/mstpd.service
+++ b/meta-google/recipes-extended/networking/files/mstpd.service
@@ -6,7 +6,7 @@
 [Service]
 Restart=always
 Type=simple
-ExecStart=/usr/sbin/mstpd -d -v 3
+ExecStart=/usr/sbin/mstpd -d -v 2
 
 [Install]
 WantedBy=multi-user.target