flash: Rename free_flash_dev to flash_dev_free

Change-Id: I3d3da6312217b6b869fa3f62a1d4752be98fd609
Signed-off-by: Andrew Jeffery <andrew@aj.id.au>
diff --git a/mboxd.c b/mboxd.c
index 545d142..7393151 100644
--- a/mboxd.c
+++ b/mboxd.c
@@ -404,7 +404,7 @@
 	clr_bmc_events(context, BMC_EVENT_DAEMON_READY, SET_BMC_EVENT);
 
 	dbus_free(context);
-	free_flash_dev(context);
+	flash_dev_free(context);
 	free_lpc_dev(context);
 	free_mbox_dev(context);
 	free_windows(context);