[media] m88ds3103: use I2C mux for tuner I2C adapter

Switch standard I2C adapter to muxed I2C adapter.

David reported that I2C adapter implementation caused deadlock.
I discussed with Jean and he suggested to implement it as a
multiplexed i2c adapter because tuner I2C bus could be seen like
own I2C segment.

Reported-by: David Howells <dhowells@redhat.com>
Cc: Jean Delvare <khali@linux-fr.org>
Signed-off-by: Antti Palosaari <crope@iki.fi>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>

drivers/media/dvb-frontends/m88ds3103_priv.h

@@ -25,6 +25,7 @@
 #include "m88ds3103.h"
 #include "dvb_math.h"
 #include <linux/firmware.h>
+#include <linux/i2c-mux.h>
 
 #define M88DS3103_FIRMWARE "dvb-demod-m88ds3103.fw"
 #define M88DS3103_MCLK_KHZ 96000
@@ -38,7 +39,7 @@ struct m88ds3103_priv {
 	fe_delivery_system_t delivery_system;
 	fe_status_t fe_status;
 	bool warm; /* FW running */
-	struct i2c_adapter i2c_adapter;
+	struct i2c_adapter *i2c_adapter;
 };
 
 struct m88ds3103_reg_val {