stream: don't include linux/types.h in some files

Apparently this is not portable to FreeBSD. It turns out that we
(probably) don't use any symbols defined by this header directly, so
the includes are not needed.

stream/stream_pvr.c

@@ -37,7 +37,6 @@
 #include <fcntl.h>
 #include <inttypes.h>
 #include <poll.h>
-#include <linux/types.h>
 #include <linux/videodev2.h>
 
 #include <libavutil/common.h>

stream/stream_radio.c

@@ -35,8 +35,6 @@
 #include <errno.h>
 #include <unistd.h>
 
-#include <linux/types.h>
-
 #if HAVE_RADIO_V4L2
 #include <linux/videodev2.h>
 #endif

stream/tvi_v4l2.c

@@ -52,7 +52,6 @@ known issues:
 #if HAVE_SYS_VIDEOIO_H
 #include <sys/videoio.h>
 #else
-#include <linux/types.h>
 #include <linux/videodev2.h>
 #endif
 #include "mpvcore/mp_msg.h"