Engine register state layout has changed a bit on Xe2.  We'll also
explicitly define a BCS layout to ensure BLIT_SWCTL and BLIT_CCTL are
included.

Bspec: 65182, 60184, 55793
Signed-off-by: Matt Roper <matthew.d.roper@intel.com>
Signed-off-by: Lucas De Marchi <lucas.demarchi@intel.com>
Reviewed-by: Matt Atwood <matthew.s.atwood@intel.com>
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>