ASoC: cs35l41: Use regmap_read_poll_timeout to wait for OTP boot

Just clean up the code a little by using the helper rather than open
coding waiting for OTP_BOOT_DONE.
Signed-off-by: Charles Keepax <ckeepax@opensource.cirrus.com>
Link: https://lore.kernel.org/r/20210914141349.30218-2-ckeepax@opensource.cirrus.comSigned-off-by: Mark Brown <broonie@kernel.org>

sound/soc/codecs/cs35l41.c

@@ -1323,7 +1323,6 @@ int cs35l41_probe(struct cs35l41_private *cs35l41,
 {
 	u32 regid, reg_revid, i, mtl_revid, int_status, chipid_match;
 	int irq_pol = 0;
-	int timeout;
 	int ret;
 
 	if (pdata) {
@@ -1377,18 +1376,14 @@ int cs35l41_probe(struct cs35l41_private *cs35l41,
 
 	usleep_range(2000, 2100);
 
-	timeout = 100;
-	do {
-		if (timeout == 0) {
+	ret = regmap_read_poll_timeout(cs35l41->regmap, CS35L41_IRQ1_STATUS4,
+				       int_status, int_status & CS35L41_OTP_BOOT_DONE,
+				       1000, 100000);
+	if (ret) {
 		dev_err(cs35l41->dev,
-				"Timeout waiting for OTP_BOOT_DONE\n");
-			ret = -EBUSY;
+			"Failed waiting for OTP_BOOT_DONE: %d\n", ret);
 		goto err;
 	}
-		usleep_range(1000, 1100);
-		regmap_read(cs35l41->regmap, CS35L41_IRQ1_STATUS4, &int_status);
-		timeout--;
-	} while (!(int_status & CS35L41_OTP_BOOT_DONE));
 
 	regmap_read(cs35l41->regmap, CS35L41_IRQ1_STATUS3, &int_status);
 	if (int_status & CS35L41_OTP_BOOT_ERR) {