dmaengine: acpi: Add kernel doc parameter descriptions

Kernel documentation script is not happy about absence of function parameter
descriptions:

drivers/dma/acpi-dma.c:163: warning: Function parameter or member 'data' not described in 'acpi_dma_controller_register'
drivers/dma/acpi-dma.c:247: warning: Function parameter or member 'data' not described in 'devm_acpi_dma_controller_register'
drivers/dma/acpi-dma.c:274: warning: Function parameter or member 'dev' not described in 'devm_acpi_dma_controller_free'

Append the descriptions of above mentioned function parameters.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://lore.kernel.org/r/20190820131546.75744-3-andriy.shevchenko@linux.intel.comSigned-off-by: Vinod Koul <vkoul@kernel.org>

drivers/dma/acpi-dma.c

@@ -147,7 +147,7 @@ static void acpi_dma_parse_csrt(struct acpi_device *adev, struct acpi_dma *adma)
  * @dev:		struct device of DMA controller
  * @acpi_dma_xlate:	translation function which converts a dma specifier
  *			into a dma_chan structure
- * @data		pointer to controller specific data to be used by
+ * @data:		pointer to controller specific data to be used by
  *			translation function
  *
  * Allocated memory should be freed with appropriate acpi_dma_controller_free()
@@ -231,7 +231,7 @@ static void devm_acpi_dma_release(struct device *dev, void *res)
  * devm_acpi_dma_controller_register - resource managed acpi_dma_controller_register()
  * @dev:		device that is registering this DMA controller
  * @acpi_dma_xlate:	translation function
- * @data		pointer to controller specific data
+ * @data:		pointer to controller specific data
  *
  * Managed acpi_dma_controller_register(). DMA controller registered by this
  * function are automatically freed on driver detach. See
@@ -264,6 +264,7 @@ EXPORT_SYMBOL_GPL(devm_acpi_dma_controller_register);
 
 /**
  * devm_acpi_dma_controller_free - resource managed acpi_dma_controller_free()
+ * @dev:	device that is unregistering as DMA controller
  *
  * Unregister a DMA controller registered with
  * devm_acpi_dma_controller_register(). Normally this function will not need to