[media] media: i2c: adv7604: Remove some unused functions

Removes some functions that are not used anywhere:
test_read() edid_read_block() dpp_write() dpp_read()
esdp_write() esdp_read() cec_write_clr_set()

This was partially found by using a static code analysis program called cppcheck.
Signed-off-by: Rickard Strandqvist <rickard_strandqvist@spectrumdigital.se>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>

drivers/media/i2c/adv7604.c

@@ -456,11 +456,6 @@ static inline int cec_write(struct v4l2_subdev *sd, u8 reg, u8 val)
 	return adv_smbus_write_byte_data(state, ADV7604_PAGE_CEC, reg, val);
 }
 
-static inline int cec_write_clr_set(struct v4l2_subdev *sd, u8 reg, u8 mask, u8 val)
-{
-	return cec_write(sd, reg, (cec_read(sd, reg) & ~mask) | val);
-}
-
 static inline int infoframe_read(struct v4l2_subdev *sd, u8 reg)
 {
 	struct adv7604_state *state = to_state(sd);
@@ -476,34 +471,6 @@ static inline int infoframe_write(struct v4l2_subdev *sd, u8 reg, u8 val)
 					 reg, val);
 }
 
-static inline int esdp_read(struct v4l2_subdev *sd, u8 reg)
-{
-	struct adv7604_state *state = to_state(sd);
-
-	return adv_smbus_read_byte_data(state, ADV7604_PAGE_ESDP, reg);
-}
-
-static inline int esdp_write(struct v4l2_subdev *sd, u8 reg, u8 val)
-{
-	struct adv7604_state *state = to_state(sd);
-
-	return adv_smbus_write_byte_data(state, ADV7604_PAGE_ESDP, reg, val);
-}
-
-static inline int dpp_read(struct v4l2_subdev *sd, u8 reg)
-{
-	struct adv7604_state *state = to_state(sd);
-
-	return adv_smbus_read_byte_data(state, ADV7604_PAGE_DPP, reg);
-}
-
-static inline int dpp_write(struct v4l2_subdev *sd, u8 reg, u8 val)
-{
-	struct adv7604_state *state = to_state(sd);
-
-	return adv_smbus_write_byte_data(state, ADV7604_PAGE_DPP, reg, val);
-}
-
 static inline int afe_read(struct v4l2_subdev *sd, u8 reg)
 {
 	struct adv7604_state *state = to_state(sd);
@@ -551,32 +518,6 @@ static inline int edid_write(struct v4l2_subdev *sd, u8 reg, u8 val)
 	return adv_smbus_write_byte_data(state, ADV7604_PAGE_EDID, reg, val);
 }
 
-static inline int edid_read_block(struct v4l2_subdev *sd, unsigned len, u8 *val)
-{
-	struct adv7604_state *state = to_state(sd);
-	struct i2c_client *client = state->i2c_clients[ADV7604_PAGE_EDID];
-	u8 msgbuf0[1] = { 0 };
-	u8 msgbuf1[256];
-	struct i2c_msg msg[2] = {
-		{
-			.addr = client->addr,
-			.len = 1,
-			.buf = msgbuf0
-		},
-		{
-			.addr = client->addr,
-			.flags = I2C_M_RD,
-			.len = len,
-			.buf = msgbuf1
-		},
-	};
-
-	if (i2c_transfer(client->adapter, msg, 2) < 0)
-		return -EIO;
-	memcpy(val, msgbuf1, len);
-	return 0;
-}
-
 static inline int edid_write_block(struct v4l2_subdev *sd,
 					unsigned len, const u8 *val)
 {
@@ -642,13 +583,6 @@ static inline int hdmi_write_clr_set(struct v4l2_subdev *sd, u8 reg, u8 mask, u8
 	return hdmi_write(sd, reg, (hdmi_read(sd, reg) & ~mask) | val);
 }
 
-static inline int test_read(struct v4l2_subdev *sd, u8 reg)
-{
-	struct adv7604_state *state = to_state(sd);
-
-	return adv_smbus_read_byte_data(state, ADV7604_PAGE_TEST, reg);
-}
-
 static inline int test_write(struct v4l2_subdev *sd, u8 reg, u8 val)
 {
 	struct adv7604_state *state = to_state(sd);