drivers: Fix BMI270 initialization

On power on reset, after disable advanced power safe mode,
you need to wait a delay before write again in the device.
The missing wait produce random initialization failure.
See §4.4 of the datasheet "bst-bmi270-ds000.pdf"

Signed-off-by: William MARTIN <william.martin@power-lan.com>
diff --git a/drivers/sensor/bmi270/bmi270.c b/drivers/sensor/bmi270/bmi270.c
index b5fb7a3..940168e 100644
--- a/drivers/sensor/bmi270/bmi270.c
+++ b/drivers/sensor/bmi270/bmi270.c
@@ -631,7 +631,8 @@
 	adv_pwr_save = BMI270_SET_BITS_POS_0(adv_pwr_save,
 					     BMI270_PWR_CONF_ADV_PWR_SAVE,
 					     BMI270_PWR_CONF_ADV_PWR_SAVE_DIS);
-	ret = reg_write(dev, BMI270_REG_PWR_CONF, &adv_pwr_save, 1);
+	ret = reg_write_with_delay(dev, BMI270_REG_PWR_CONF, &adv_pwr_save, 1,
+		BMI270_INTER_WRITE_DELAY_US);
 	if (ret != 0) {
 		return ret;
 	}