[media] saa6588: rename rds.h to saa6588.h

The naming of the media/rds.h header suggested that it was a generic
RDS header, when in fact it is just a saa6588 module API that is
internal to the kernel.

Rename the header and the struct and defines in it to make this clear.

Also removed the header include in radio-si470x.h (not used anymore)
and from ioctl-number.txt (it's internal to the kernel and never called
from userspace).

Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
diff --git a/include/media/saa6588.h b/include/media/saa6588.h
new file mode 100644
index 0000000..2c3c442
--- /dev/null
+++ b/include/media/saa6588.h
@@ -0,0 +1,42 @@
+/*
+
+    Types and defines needed for RDS. This is included by
+    saa6588.c and every driver (e.g. bttv-driver.c) that wants
+    to use the saa6588 module.
+
+    (c) 2005 by Hans J. Koch
+
+    This program is free software; you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation; either version 2 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program; if not, write to the Free Software
+    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+
+*/
+
+#ifndef _SAA6588_H
+#define _SAA6588_H
+
+struct saa6588_command {
+	unsigned int  block_count;
+	int           result;
+	unsigned char __user *buffer;
+	struct file   *instance;
+	poll_table    *event_list;
+};
+
+/* These ioctls are internal to the kernel */
+#define SAA6588_CMD_OPEN	_IOW('R', 1, int)
+#define SAA6588_CMD_CLOSE	_IOW('R', 2, int)
+#define SAA6588_CMD_READ	_IOR('R', 3, int)
+#define SAA6588_CMD_POLL	_IOR('R', 4, int)
+
+#endif