ACPI: sysfs: fix doc warnings in device_sysfs.c

Fixes the following W=1 kernel build warning(s):

 drivers/acpi/device_sysfs.c:278: warning: Function parameter or
  member 'dev' not described in 'acpi_device_uevent_modalias'
 drivers/acpi/device_sysfs.c:278: warning: Function parameter or
  member 'env' not described in 'acpi_device_uevent_modalias'
 drivers/acpi/device_sysfs.c:323: warning: Function parameter or
  member 'dev' not described in 'acpi_device_modalias'
 drivers/acpi/device_sysfs.c:323: warning: Function parameter or
  member 'buf' not described in 'acpi_device_modalias'
 drivers/acpi/device_sysfs.c:323: warning: Function parameter or
  member 'size' not described in 'acpi_device_modalias'

Signed-off-by: Baokun Li <libaokun1@huawei.com>
[ rjw: Fix spelling: acpi -> ACPI ]
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

drivers/acpi/device_sysfs.c

@@ -268,6 +268,8 @@ int __acpi_device_uevent_modalias(struct acpi_device *adev,
 
 /**
  * acpi_device_uevent_modalias - uevent modalias for ACPI-enumerated devices.
+ * @dev: Struct device to get ACPI device node.
+ * @env: Environment variables of the kobject uevent.
  *
  * Create the uevent modalias field for ACPI-enumerated devices.
  *
@@ -313,6 +315,9 @@ static int __acpi_device_modalias(struct acpi_device *adev, char *buf, int size)
 
 /**
  * acpi_device_modalias - modalias sysfs attribute for ACPI-enumerated devices.
+ * @dev: Struct device to get ACPI device node.
+ * @buf: The buffer to save pnp_modalias and of_modalias.
+ * @size: Size of buffer.
  *
  * Create the modalias sysfs attribute for ACPI-enumerated devices.
  *