drm/i915/bxt: BXT FBC enablement
drm/i915/bxt: BXT FBC enablement

Enable FBC feature on Broxton

Issue: VIZ-3784
Signed-off-by: Daisy Sun <67041bce6adfaf6b1f9ce7d2d364df7a68e5d79f@intel.com>
Signed-off-by: Damien Lespiau <64bd3cb94f359c1a3ce68dae5e26b40578526277@intel.com>
Reviewed-by: Antti Koskipää <7a56f34651dc9afb7a41d71fc3e3a28b59e34272@linux.intel.com>
Signed-off-by: Daniel Vetter <c1b6782c4af8f0673da8923a0702a1832e5940f4@ffwll.ch>

KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs