Fix kmscon_console_unref name

The name of the unref function was wrong. Fix this from kmscon_con_unref to
kmscon_console_unref.

Signed-off-by: David Herrmann <dh.herrmann@googlemail.com>

src/console.c

@@ -55,7 +55,7 @@ void kmscon_console_ref(struct kmscon_console *con)
 	++con->ref;
 }
 
-void kmscon_con_unref(struct kmscon_console *con)
+void kmscon_console_unref(struct kmscon_console *con)
 {
 	if (!con || !con->ref)
 		return;