ASoC: codec: cs42l73: Drop cs42l73.h

There is no in-tree user of "include/sound/cs42l56.h", so move
'struct cs42l73_platform_data ' to cs42l73.c and remove the header file.
And platform data is mostly for legacy platforms that create devices
non using device tree. So drop cs42l73.h to prepare using GPIOD API.

Signed-off-by: Peng Fan <peng.fan@nxp.com>
Link: https://patch.msgid.link/20250506-csl42x-v3-5-e9496db544c4@nxp.com
Signed-off-by: Mark Brown <broonie@kernel.org>

Author: MrVan

include/sound/cs42l73.h

@@ -19,7 +19,6 @@
 #include <linux/regmap.h>
 #include <linux/slab.h>
 #include <sound/core.h>
-#include <sound/cs42l73.h>
 #include <sound/initval.h>
 #include <sound/pcm.h>
 #include <sound/pcm_params.h>
@@ -29,6 +28,14 @@
 #include "cirrus_legacy.h"
 #include "cs42l73.h"
 
+struct cs42l73_platform_data {
+	/* RST GPIO */
+	unsigned int reset_gpio;
+	unsigned int chgfreq;
+	int jack_detection;
+	unsigned int mclk_freq;
+};
+
 struct sp_config {
 	u8 spc, mmcc, spfs;
 	u32 srate;
@@ -1276,7 +1283,7 @@ static const struct regmap_config cs42l73_regmap = {
 static int cs42l73_i2c_probe(struct i2c_client *i2c_client)
 {
 	struct cs42l73_private *cs42l73;
-	struct cs42l73_platform_data *pdata = dev_get_platdata(&i2c_client->dev);
+	struct cs42l73_platform_data *pdata;
 	int ret, devid;
 	unsigned int reg;
 	u32 val32;
@@ -1292,23 +1299,16 @@ static int cs42l73_i2c_probe(struct i2c_client *i2c_client)
 		return ret;
 	}
 
-	if (pdata) {
-		cs42l73->pdata = *pdata;
-	} else {
-		pdata = devm_kzalloc(&i2c_client->dev, sizeof(*pdata),
-				     GFP_KERNEL);
-		if (!pdata)
-			return -ENOMEM;
-
-		if (i2c_client->dev.of_node) {
-			if (of_property_read_u32(i2c_client->dev.of_node,
-				"chgfreq", &val32) >= 0)
-				pdata->chgfreq = val32;
-		}
-		pdata->reset_gpio = of_get_named_gpio(i2c_client->dev.of_node,
-						"reset-gpio", 0);
-		cs42l73->pdata = *pdata;
+	pdata = devm_kzalloc(&i2c_client->dev, sizeof(*pdata), GFP_KERNEL);
+	if (!pdata)
+		return -ENOMEM;
+
+	if (i2c_client->dev.of_node) {
+		if (of_property_read_u32(i2c_client->dev.of_node, "chgfreq", &val32) >= 0)
+			pdata->chgfreq = val32;
 	}
+	pdata->reset_gpio = of_get_named_gpio(i2c_client->dev.of_node, "reset-gpio", 0);
+	cs42l73->pdata = *pdata;
 
 	i2c_set_clientdata(i2c_client, cs42l73);