util/inteltool: Add pci ids for 4 northbridge models instead of 1.

This patch supports northbridges: 0x0150 0x0154 0x0158 0x015c as 3rd gen core.
Tested on 0x0150 (0x0154 previously only model).

Change-Id: I53a33d864494dd4ac1cb9e8330450f56001ed92c
Signed-off-by: Damien Zammit <damien@zamaudio.com>
Reviewed-on: http://review.coreboot.org/5873
Tested-by: build bot (Jenkins)
Reviewed-by: Patrick Georgi <patrick@georgi-clan.de>
Reviewed-by: Edward O'Callaghan <eocallaghan@alterapraxis.com>
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>