[media] rtl2830: convert to regmap API

Use regmap to cover register access routines.
Signed-off-by: Antti Palosaari <crope@iki.fi>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>

drivers/media/dvb-frontends/Kconfig

@@ -444,6 +444,7 @@ config DVB_CXD2820R
 config DVB_RTL2830
 	tristate "Realtek RTL2830 DVB-T"
 	depends on DVB_CORE && I2C && I2C_MUX
+	select REGMAP
 	default m if !MEDIA_SUBDRV_AUTOSELECT
 	help
 	  Say Y when you want to support this frontend.

drivers/media/dvb-frontends/rtl2830_priv.h

@@ -23,15 +23,15 @@
 #include "rtl2830.h"
 #include <linux/i2c-mux.h>
 #include <linux/math64.h>
+#include <linux/regmap.h>
 
 struct rtl2830_dev {
 	struct rtl2830_platform_data *pdata;
 	struct i2c_client *client;
+	struct regmap *regmap;
 	struct i2c_adapter *adapter;
 	struct dvb_frontend fe;
 	bool sleeping;
-	struct mutex i2c_mutex;
-	u8 page; /* active register page */
 	unsigned long filters;
 	struct delayed_work stat_work;
 	fe_status_t fe_status;