inteltool: refine GPIO and PMBASE/TCO printing on Ibex Peak/5 Series

Nicolas Reinecke was noticing that in my Lenovo T410s logs the GPIO*3
settings were missing. This led to some investigation and this patch, thanks!

Change-Id: I7ba28aa00d10f988a7fe81e61d2e216b54a11006
Signed-off-by: Alexander Couzens <lynxis@fe80.eu>
Signed-off-by: Stefan Tauner <stefan.tauner@gmx.at>
Reviewed-on: http://review.coreboot.org/7239
Reviewed-by: Nicolas Reinecke <nr@das-labor.org>
Tested-by: build bot (Jenkins)
Reviewed-by: Nico Huber <nico.h@gmx.de>