mboxd: increase verbosity

Change-Id: Ieb8f007b0cc7f4699740913b06e1243629171621
Signed-off-by: Patrick Williams <patrick@stwcx.xyz>
diff --git a/common/recipes-phosphor/mboxd/mboxd/mboxd.service b/common/recipes-phosphor/mboxd/mboxd/mboxd.service
index 103adaa..5a10b95 100644
--- a/common/recipes-phosphor/mboxd/mboxd/mboxd.service
+++ b/common/recipes-phosphor/mboxd/mboxd/mboxd.service
@@ -3,7 +3,7 @@
 
 [Service]
 Restart=always
-ExecStart={sbindir}/mboxd --flash {FLASH_SIZE}
+ExecStart={sbindir}/mboxd --flash {FLASH_SIZE} --verbose
 Wants=dev-aspeed-mbox.device
 After=dev-aspeed-mbox.device