drm/i915/fbc: remove one duplicate forward declaration

Remove the duplicate "intel_display"declaration from intel_fbc.h

Signed-off-by: Vinod Govindapillai <[e-mail]>
Reviewed-by: Jani Nikula <[e-mail]>
Signed-off-by: Mika Kahola <[e-mail]>
Link: https://patchwork.freedesktop.org/patch/msgid/[e-mail]

drivers/gpu/drm/i915/display/intel_fbc.h

···
 struct intel_crtc;
 struct intel_crtc_state;
 struct intel_display;
-struct intel_display;
 struct intel_fbc;
 struct intel_plane;
 struct intel_plane_state;