iio:core: Tidy up kernel-doc.

One comment isn't kernel-doc at all, but starts with /** and another
is simply missing a parameter that was introduced recently.
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Acked-by: Alexandru Ardelean <alexandru.ardelean@analog.com>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Link: https://lore.kernel.org/r/20200913132115.800131-4-jic23@kernel.org

drivers/iio/industrialio-core.c

@@ -170,7 +170,7 @@ static const char * const iio_chan_info_postfix[] = {
 };
 
 #if defined(CONFIG_DEBUG_FS)
-/**
+/*
  * There's also a CONFIG_DEBUG_FS guard in include/linux/iio/iio.h for
  * iio_get_debugfs_dentry() to make it inline if CONFIG_DEBUG_FS is undefined
  */
@@ -1525,6 +1525,7 @@ struct device_type iio_device_type = {
 
 /**
  * iio_device_alloc() - allocate an iio_dev from a driver
+ * @parent:		Parent device.
  * @sizeof_priv:	Space to allocate for private structure.
  **/
 struct iio_dev *iio_device_alloc(struct device *parent, int sizeof_priv)