INC_512 usage

Hi maintainers!
Just a heads up regarding the comment about INC_512 here:

Line 294 in 42a6225

// Seagate 7E200 series seems to require INC_512 to be set, and all other

I believe that seagate is correct in requiring the bit to be set (this is also required on a western digital drive I'm using). But the INC_512 bit is expected to be set to zero in some conditions as pointed in this spec.
https://www.trustedcomputinggroup.org/wp-content/uploads/TCG_SWG_SIIS_Version_1_03_Revision_1_00.pdf#page=14