drm/rockchip: vop2: Drop superfluous include

The rockchip_drm_fb.h header contains just a single function which is
not directly used by the VOP2 driver.  Drop the unnecessary include.
Signed-off-by: Cristian Ciocaltea <cristian.ciocaltea@collabora.com>
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
Link: https://patchwork.freedesktop.org/patch/msgid/20240104143951.85219-1-cristian.ciocaltea@collabora.com

drivers/gpu/drm/rockchip/rockchip_drm_vop2.c

@@ -35,7 +35,6 @@
 
 #include "rockchip_drm_drv.h"
 #include "rockchip_drm_gem.h"
-#include "rockchip_drm_fb.h"
 #include "rockchip_drm_vop2.h"
 #include "rockchip_rgb.h"