image parsing for getpir

image parsing for getpir

when adding for example build/coreboot_ram as parameter
it looks in the file for the PIRQ table prints it to stdout
and shows if the checksum is correct.

getpir works as before without any commandline parameters.

This is very handy for developing a PIRQ table.

Signed-off-by: Marc Bertens <mbertens@xs4all.nl>
Acked-by: Stefan Reinauer <stepan@coresystems.de>
git-svn-id: svn://svn.coreboot.org/coreboot/trunk@5716 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1