drm/rockchip: vop2: add missing bitfield.h include

Commit 328e688 ("drm/rockchip: vop2: Add platform specific callback")
moved per soc configuration code to the other per-soc data into
rockchip_vop2_reg.c, but forgot to also include bitfield.h for the used
FIELD_PREP macro. Add this missing include.

Fixes: 328e688 ("drm/rockchip: vop2: Add platform specific callback")
Reported-by: kernel test robot <[email protected]>
Closes: https://lore.kernel.org/oe-kbuild-all/[email protected]/
Reviewed-by: Sebastian Reichel <[email protected]>
Signed-off-by: Heiko Stuebner <[email protected]>
Link: https://patchwork.freedesktop.org/patch/msgid/[email protected]

Author: mmind

drivers/gpu/drm/rockchip/rockchip_vop2_reg.c

@@ -4,6 +4,7 @@
  * Author: Andy Yan <[email protected]>
  */
 
+#include <linux/bitfield.h>
 #include <linux/kernel.h>
 #include <linux/component.h>
 #include <linux/mod_devicetable.h>