media: vivid: Include <linux/prandom.h> in vivid-vid-cap.c

Include <linux/prandom.h> to allow the removal of legacy
inclusion of <linux/prandom.h> from <linux/random.h>.

Signed-off-by: Uros Bizjak <ubizjak@gmail.com>
Cc: Mauro Carvalho Chehab <mchehab@kernel.org>
Cc: linux-media@vger.kernel.org
Acked-by: Hans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>

Author: ubizjak

drivers/media/test-drivers/vivid/vivid-vid-cap.c

@@ -10,6 +10,7 @@
 #include <linux/sched.h>
 #include <linux/vmalloc.h>
 #include <linux/videodev2.h>
+#include <linux/prandom.h>
 #include <linux/v4l2-dv-timings.h>
 #include <media/v4l2-common.h>
 #include <media/v4l2-event.h>