drm/i915/tgl: Extend Wa_1409767108:tgl to B0 stepping

Cc: Matt Atwood <matthew.s.atwood@intel.com>
Signed-off-by: Matt Roper <matthew.d.roper@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20200414211118.2787489-2-matthew.d.roper@intel.com


Reviewed-by: José Roberto de Souza <jose.souza@intel.com>