iio: chemical: sps030: Reformat comment in a more readable way

It's easier to see the (lack of) difference between the lines when they
are visually aligned.

Signed-off-by: Jonathan Neuschäfer <j.neuschaefer@gmx.net>
Link: https://lore.kernel.org/r/20230129132020.1352368-1-j.neuschaefer@gmx.net
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

drivers/iio/chemical/sps30_i2c.c

@@ -68,10 +68,10 @@ static int sps30_i2c_command(struct sps30_state *state, u16 cmd, void *arg, size
 	/*
 	 * Internally sensor stores measurements in a following manner:
 	 *
-	 * PM1: upper two bytes, crc8, lower two bytes, crc8
+	 * PM1:   upper two bytes, crc8, lower two bytes, crc8
 	 * PM2P5: upper two bytes, crc8, lower two bytes, crc8
-	 * PM4: upper two bytes, crc8, lower two bytes, crc8
-	 * PM10: upper two bytes, crc8, lower two bytes, crc8
+	 * PM4:   upper two bytes, crc8, lower two bytes, crc8
+	 * PM10:  upper two bytes, crc8, lower two bytes, crc8
 	 *
 	 * What follows next are number concentration measurements and
 	 * typical particle size measurement which we omit.