Chipsets sb700 and sb800/hudson have more than one USB EHCI controller,
implement the selection logic using already existing Kconfig option.
Change-Id: I9e0df1669d73863c95c36a3a7fee40d58f6f097e
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: http://review.coreboot.org/3928
Tested-by: build bot (Jenkins)
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>