Remove CONFIG_CPU_AMD_FAM10 & CONFIG_CPU_AMDK8 from mainboards. They should be

Remove CONFIG_CPU_AMD_FAM10 & CONFIG_CPU_AMDK8 from mainboards.  They should be
selected in sockets, and they aren't used yet.

Add a couple of variables to src/Kconfig for lack of a better place so that
their selects work.
Add select statements according to newconfig for some variables that were
defined but never selected in mainboard configs.

Fix #if CONFIG_VGA==1 -> #if CONFIG_VGA.

Signed-off-by: Myles Watson <mylesgw@gmail.com>
Acked-by: Uwe Hermann <uwe@hermann-uwe.de>
git-svn-id: svn://svn.coreboot.org/coreboot/trunk@4816 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1