[media] mn88473: convert driver to I2C binding

Driver was using DVB proprietary binding model. As it is I2C
device, we could change it to normal kernel I2C driver.
Signed-off-by: Antti Palosaari <crope@iki.fi>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>

drivers/media/dvb-frontends/mn88473.h

@@ -21,26 +21,18 @@
 
 struct mn88473_config {
 	/*
-	 * max bytes I2C client could write
-	 * Value must be set.
+	 * Max num of bytes given I2C adapter could write at once.
+	 * Default: none
 	 */
-	int i2c_wr_max;
-};
+	u16 i2c_wr_max;
 
-#if IS_ENABLED(CONFIG_DVB_MN88473)
-extern struct dvb_frontend *mn88473_attach(
-	const struct mn88473_config *cfg,
-	struct i2c_adapter *i2c
-);
-#else
-static inline struct dvb_frontend *mn88473_attach(
-	const struct mn88473_config *cfg,
-	struct i2c_adapter *i2c
-)
-{
-	dev_warn(&i2c->dev, "%s: driver disabled by Kconfig\n", __func__);
-	return NULL;
-}
-#endif
+
+	/* Everything after that is returned by the driver. */
+
+	/*
+	 * DVB frontend.
+	 */
+	struct dvb_frontend **fe;
+};
 
 #endif

drivers/media/dvb-frontends/mn88473_priv.h

@@ -24,9 +24,9 @@
 #define MN88473_FIRMWARE "dvb-demod-mn88473-01.fw"
 
 struct mn88473_dev {
-	struct i2c_adapter *i2c;
-	const struct mn88473_config *cfg;
+	struct i2c_client *client[3];
 	struct dvb_frontend fe;
+	u16 i2c_wr_max;
 	fe_delivery_system_t delivery_system;
 	bool warm; /* FW running */
 };