As a hack, use CD_SKIPHIBERNATE. For 2.0, our TPM lifecycle management

As a hack, use CD_SKIPHIBERNATE.  For 2.0, our TPM lifecycle management
is improper, and some chips are more sensitive to this than others.  In an
unhibernate situation, /bsd.booted will 'suspend' the TPM, then jump directly
into unhib /bsd, which 'resumes' it.  This is wrong because the lifecycle is
supposed to be more like suspend->BIOS->resume.  This is a hack until we figure
out how to fix the lifecycle.
from claudio, ok dv