iio: imu: bno055: uninitialized variable bug in bno055_trigger_handler()

This bug is basically harmless, although it will trigger a runtime warning
if you use KMSan. On the first iteration through the loop, the
"best_delta" variable is uninitialized so re-order the condition to
prevent reading uninitialized memory.

Fixes: 4aefe1c2bd0c ("iio: imu: add Bosch Sensortec BNO055 core driver")
Signed-off-by: Dan Carpenter <[e-mail]>
Acked-by: Nuno Sá <[e-mail]>
Link: https://lore.kernel.org/r/Y0kuaO9PQkSQja+A@kili
Signed-off-by: Jonathan Cameron <[e-mail]>

drivers/iio/imu/bno055/bno055.c

···
 			return -EINVAL;
 		}
 		delta = abs(tbl_val - req_val);
-		if (delta < best_delta || first) {
+		if (first || delta < best_delta) {
 			best_delta = delta;
 			hwval = i;
 			first = false;