drivers: sensor: bmi270: Convert sample to use DEVICE_DT_GET_ONE

Move to use DEVICE_DT_GET_ONE instead of device_get_binding as
we work on phasing out use of DTS 'label' property.

Signed-off-by: Benjamin Björnsson <benjamin.bjornsson@gmail.com>
diff --git a/samples/sensor/bmi270/src/main.c b/samples/sensor/bmi270/src/main.c
index a977a0e..65859e8 100644
--- a/samples/sensor/bmi270/src/main.c
+++ b/samples/sensor/bmi270/src/main.c
@@ -11,19 +11,16 @@
 
 void main(void)
 {
-	const struct device *dev;
+	const struct device *dev = DEVICE_DT_GET_ONE(bosch_bmi270);
 	struct sensor_value acc[3], gyr[3];
 	struct sensor_value full_scale, sampling_freq, oversampling;
 
-	dev = device_get_binding(DT_LABEL(DT_INST(0, bosch_bmi270)));
-	if (dev == NULL) {
-		printf("Could not get %s device\n",
-		       DT_LABEL(DT_INST(0, bosch_bmi270)));
+	if (!device_is_ready(dev)) {
+		printf("Device %s is not ready\n", dev->name);
 		return;
 	}
 
-	printf("Device %p name is %s\n", dev,
-	       DT_LABEL(DT_INST(0, bosch_bmi270)));
+	printf("Device %p name is %s\n", dev, dev->name);
 
 	/* Setting scale in G, due to loss of precision if the SI unit m/s^2
 	 * is used