drm/amd/display: Set static screen register for stoney/carrizo

-Set CRTC_STATIC_SCREEN_EVENT for stoney/carrizo for FBC implementation
-Code is currently guarded with "ENABLE_FBC" compile time flag

Signed-off-by: Bhawanpreet Lakha <Bhawanpreet.Lakha@amd.com>
Reviewed-by: Roman Li <Roman.Li@amd.com>
Acked-by: Harry Wentland <Harry.Wentland@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/display/dc/dce110/dce110_hw_sequencer.c

@@ -1395,6 +1395,10 @@ static void set_static_screen_control(struct pipe_ctx **pipe_ctx,
 	if (events->cursor_update)
 		value |= 0x2;
 
+#ifdef ENABLE_FBC
+	value |= 0x84;
+#endif
+
 	for (i = 0; i < num_pipes; i++)
 		pipe_ctx[i]->tg->funcs->
 			set_static_screen_control(pipe_ctx[i]->tg, value);