iio: accel: mma8452: Add missing documentation for name element of chip_info

Documentation needed to avoid build warning with W=1 builds. It doesn't
really add any non obvious information but good to have it anyway.

No fixes tag as not worth backporting onto the fix that added the name
element to the structure.
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Link: https://lore.kernel.org/r/20220410153317.290896-1-jic23@kernel.org

drivers/iio/accel/mma8452.c

@@ -166,6 +166,7 @@ static const struct mma8452_event_regs trans_ev_regs = {
 
 /**
  * struct mma_chip_info - chip specific data
+ * @name:			part number of device reported via 'name' attr
  * @chip_id:			WHO_AM_I register's value
  * @channels:			struct iio_chan_spec matching the device's
  *				capabilities