Revision 3231

libpayload: Support functions for Geode

The Geode video driver will require a number of support functions,
including udelay(), PCI bus walking and MSRs.  This adds those functions
in preparation for the actual code.

Signed-off-by: Jordan Crouse <jordan.crouse@amd.com>
Acked-by: Uwe Hermann <uwe@hermann-uwe.de>