V4L/DVB (12551): FM TX: si4713: Add files to add radio interface for si4713

This patch adds files which creates the radio interface
for si4713 FM transmitter (modulator) devices.

In order to do the real access to device registers, this
driver uses the v4l2 subdev interface exported by si4713 i2c driver.
Signed-off-by: Eduardo Valentin <eduardo.valentin@nokia.com>
Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

include/media/radio-si4713.h

+/*
+ * include/media/radio-si4713.h
+ *
+ * Board related data definitions for Si4713 radio transmitter chip.
+ *
+ * Copyright (c) 2009 Nokia Corporation
+ * Contact: Eduardo Valentin <eduardo.valentin@nokia.com>
+ *
+ * This file is licensed under the terms of the GNU General Public License
+ * version 2. This program is licensed "as is" without any warranty of any
+ * kind, whether express or implied.
+ *
+ */
+
+#ifndef RADIO_SI4713_H
+#define RADIO_SI4713_H
+
+#include <linux/i2c.h>
+
+#define SI4713_NAME "radio-si4713"
+
+/*
+ * Platform dependent definition
+ */
+struct radio_si4713_platform_data {
+	int i2c_bus;
+	struct i2c_board_info *subdev_board_info;
+};
+
+#endif /* ifndef RADIO_SI4713_H*/