drm/i915: BDW: Adding missing cursor offsets.

BDW uses IVB cursor offsets.

Whithout this patch it is not possible to use multiple outputs with cursor
on BDW.
The cursor gets completely crazy because update position uses the wrong
cursor register for the second pipe.

Signed-off-by: Rodrigo Vivi <rodrigo.vivi@gmail.com>
Cc: stable@vger.kernel.org
Reviewed-by: Ben Widawsky <ben@bwidawsk.net>
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=79621
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

drivers/gpu/drm/i915/i915_drv.c

@@ -321,6 +321,7 @@ static const struct intel_device_info intel_broadwell_m_info = {
 	.has_ddi = 1,
 	.has_fbc = 1,
 	GEN_DEFAULT_PIPEOFFSETS,
+	IVB_CURSOR_OFFSETS,
 };
 
 static const struct intel_device_info intel_broadwell_gt3d_info = {
@@ -331,6 +332,7 @@ static const struct intel_device_info intel_broadwell_gt3d_info = {
 	.has_ddi = 1,
 	.has_fbc = 1,
 	GEN_DEFAULT_PIPEOFFSETS,
+	IVB_CURSOR_OFFSETS,
 };
 
 static const struct intel_device_info intel_broadwell_gt3m_info = {