From the struct element comment for DRM_NX_GEM_GET, the driver
should fill struct nx_gem_info::flags but it did not. Add nx gem
flags for DRM_NX_GEM_GET ioctl as its description.
Change-Id: If2c1a72077b4ab85786f2c71b0c27502bd86e4b1 Signed-off-by: Seung-Woo Kim <sw0312.kim@samsung.com>