console: rename do_vtxprintf to do_printk_va_list and use it

The name is more consistent with what we have elsewhere,
and the callsite didn't build at all (with vboot enabled)

Change-Id: I3576f3b8f737d360f68b67b6ce1683199948776d
Signed-off-by: Aaron Durbin <adurbin@chromium.org>
Signed-off-by: Patrick Georgi <pgeorgi@chromium.org>
Reviewed-on: http://review.coreboot.org/10096
Tested-by: build bot (Jenkins)

src/console/printk.c

@@ -54,8 +54,10 @@ int do_printk(int msg_level, const char *fmt, ...)
 }
 
 #if IS_ENABLED (CONFIG_CHROMEOS)
-void do_vtxprintf(const char *fmt, va_list args)
+void do_printk_va_list(int msg_level, const char *fmt, va_list args)
 {
+	if (!console_log_level(msg_level))
+		return;
 	vtxprintf(wrap_putchar, fmt, args, NULL);
 	console_tx_flush();
 }