[media] e4000: convert to Regmap API

That comes possible after driver was converted to kernel I2C model
(I2C binding & proper I2C client with no gate control hack). All
nasty low level I2C routines are now covered by regmap.

Cc: Hans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: Antti Palosaari <crope@iki.fi>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>

drivers/media/tuners/Kconfig

@@ -204,6 +204,7 @@ config MEDIA_TUNER_TDA18212
 config MEDIA_TUNER_E4000
 	tristate "Elonics E4000 silicon tuner"
 	depends on MEDIA_SUPPORT && I2C && VIDEO_V4L2
+	select REGMAP_I2C
 	default m if !MEDIA_SUBDRV_AUTOSELECT
 	help
 	  Elonics E4000 silicon tuner driver.

drivers/media/tuners/e4000_priv.h

@@ -24,9 +24,11 @@
 #include "e4000.h"
 #include <media/v4l2-ctrls.h>
 #include <media/v4l2-subdev.h>
+#include <linux/regmap.h>
 
 struct e4000_priv {
 	struct i2c_client *client;
+	struct regmap *regmap;
 	u32 clock;
 	struct dvb_frontend *fe;
 	struct v4l2_subdev sd;