Add RB_C3 to AMD_FAM10_ALL so that it gets its MSR right for mtrs, ht, etc.

Add RB_C3 to AMD_FAM10_ALL so that it gets its MSR right for mtrs, ht, etc.

While reviewing impact of this change it seems code for erratum 531 was not in
sync with current docs. I have checked uses of AMD_FAM10_ALL, but I
haven't looked up the docs for all of them, at first sight it seems ok
to include all FAM10 revisions in this mask.

Apply errata 531 only to revisions listed in  Revision Guide for AMD Family10h
processors (#41322) rev 3.74 June 2010. Before it was applied also to
DR-B0, DA-C3 or HY-D0 which are not affected according to current docs.

Signed-off-by: Xavi Drudis Ferran <xdrudis@tinet.cat>
Acked-by: Stefan Reinauer <stepan@coresystems.de>
git-svn-id: svn://svn.coreboot.org/coreboot/trunk@5729 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1