iio: accel: adxl345: replace magic numbers by unit expressions

Replace absolute numbers by their expressions from units.h to avoid
using magic numbers. Use uniform expressions to clarify their usage.

This is a refactoring change and should not impact functionality.

Signed-off-by: Lothar Rubusch <[e-mail]>
Link: https://patch.msgid.link/[e-mail]
Signed-off-by: Jonathan Cameron <[e-mail]>

drivers/iio/accel/adxl345_core.c

···
 			return IIO_VAL_INT;
 		case IIO_EV_INFO_TIMEOUT:
 			*val = st->tap_duration_us;
-			*val2 = 1000000;
+			*val2 = MICRO;
 			return IIO_VAL_FRACTIONAL;
 		case IIO_EV_INFO_RESET_TIMEOUT:
 			*val = st->tap_window_us;
-			*val2 = 1000000;
+			*val2 = MICRO;
 			return IIO_VAL_FRACTIONAL;
 		case IIO_EV_INFO_TAP2_MIN_DELAY:
 			*val = st->tap_latent_us;
-			*val2 = 1000000;
+			*val2 = MICRO;
 			return IIO_VAL_FRACTIONAL;
 		default:
 			return -EINVAL;