libipt: support 6/140 and 6/141

We do not know about the errata for those microarchitectures but let's
assume that we carry forward existing errata until we know more.

Change-Id: I823eb1a5c4c91edea92319cdb77b235923efbb98
Signed-off-by: Markus Metzger <markus.t.metzger@intel.com>