drm: fix parameters documentation style in drm_dma

Remove old documentation style and use new one to avoid warnings when
compiling with W=1
Signed-off-by: Benjamin Gaignard <benjamin.gaignard@st.com>
Acked-by: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20200114160135.14990-1-benjamin.gaignard@st.com

drivers/gpu/drm/drm_dma.c

@@ -42,10 +42,10 @@
 #include "drm_legacy.h"
 
 /**
- * Initialize the DMA data.
+ * drm_legacy_dma_setup() - Initialize the DMA data.
  *
- * \param dev DRM device.
- * \return zero on success or a negative value on failure.
+ * @dev: DRM device.
+ * Return: zero on success or a negative value on failure.
  *
  * Allocate and initialize a drm_device_dma structure.
  */
@@ -71,9 +71,9 @@ int drm_legacy_dma_setup(struct drm_device *dev)
 }
 
 /**
- * Cleanup the DMA resources.
+ * drm_legacy_dma_takedown() - Cleanup the DMA resources.
  *
- * \param dev DRM device.
+ * @dev: DRM device.
  *
  * Free all pages associated with DMA buffers, the buffers and pages lists, and
  * finally the drm_device::dma structure itself.
@@ -120,10 +120,10 @@ void drm_legacy_dma_takedown(struct drm_device *dev)
 }
 
 /**
- * Free a buffer.
+ * drm_legacy_free_buffer() - Free a buffer.
  *
- * \param dev DRM device.
- * \param buf buffer to free.
+ * @dev: DRM device.
+ * @buf: buffer to free.
  *
  * Resets the fields of \p buf.
  */
@@ -139,9 +139,10 @@ void drm_legacy_free_buffer(struct drm_device *dev, struct drm_buf * buf)
 }
 
 /**
- * Reclaim the buffers.
+ * drm_legacy_reclaim_buffers() - Reclaim the buffers.
  *
- * \param file_priv DRM file private.
+ * @dev: DRM device.
+ * @file_priv: DRM file private.
  *
  * Frees each buffer associated with \p file_priv not already on the hardware.
  */