/usr/arm-linux-gnueabihf/include/drm/ is in linux-libc-dev-armhf-cross 3.2.0-23.36cross1.82.
This file is owned by root:root, with mode 0o755.
..
/usr/arm-linux-gnueabihf/include/drm/drm.h
/usr/arm-linux-gnueabihf/include/drm/drm_mode.h
/usr/arm-linux-gnueabihf/include/drm/drm_sarea.h
/usr/arm-linux-gnueabihf/include/drm/i810_drm.h
/usr/arm-linux-gnueabihf/include/drm/i915_drm.h
/usr/arm-linux-gnueabihf/include/drm/mga_drm.h
/usr/arm-linux-gnueabihf/include/drm/nouveau_drm.h
/usr/arm-linux-gnueabihf/include/drm/r128_drm.h
/usr/arm-linux-gnueabihf/include/drm/radeon_drm.h
/usr/arm-linux-gnueabihf/include/drm/savage_drm.h
/usr/arm-linux-gnueabihf/include/drm/sis_drm.h
/usr/arm-linux-gnueabihf/include/drm/via_drm.h
/usr/arm-linux-gnueabihf/include/drm/vmwgfx_drm.h