drm/atmel-hlcdc/atmel_hlcdc_crtc: Apply correct formatting to struct docs

And fix-up a misnamed member description.

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

 drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_crtc.c:33: warning: cannot understand function prototype: 'struct atmel_hlcdc_crtc_state '
 drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_crtc.c:52: warning: cannot understand function prototype: 'struct atmel_hlcdc_crtc '

Cc: Sam Ravnborg <sam@ravnborg.org>
Cc: Boris Brezillon <bbrezillon@kernel.org>
Cc: David Airlie <airlied@linux.ie>
Cc: Daniel Vetter <daniel@ffwll.ch>
Cc: Nicolas Ferre <nicolas.ferre@microchip.com>
Cc: Alexandre Belloni <alexandre.belloni@bootlin.com>
Cc: Ludovic Desroches <ludovic.desroches@microchip.com>
Cc: Jean-Jacques Hiblot <jjhiblot@traphandler.com>
Cc: dri-devel@lists.freedesktop.org
Cc: linux-arm-kernel@lists.infradead.org
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20201112190039.2785914-14-lee.jones@linaro.org

drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_crtc.c

@@ -25,7 +25,7 @@
 #include "atmel_hlcdc_dc.h"
 
 /**
- * Atmel HLCDC CRTC state structure
+ * struct atmel_hlcdc_crtc_state - Atmel HLCDC CRTC state structure
  *
  * @base: base CRTC state
  * @output_mode: RGBXXX output mode
@@ -42,10 +42,10 @@ drm_crtc_state_to_atmel_hlcdc_crtc_state(struct drm_crtc_state *state)
 }
 
 /**
- * Atmel HLCDC CRTC structure
+ * struct atmel_hlcdc_crtc - Atmel HLCDC CRTC structure
  *
  * @base: base DRM CRTC structure
- * @hlcdc: pointer to the atmel_hlcdc structure provided by the MFD device
+ * @dc: pointer to the atmel_hlcdc structure provided by the MFD device
  * @event: pointer to the current page flip event
  * @id: CRTC id (returned by drm_crtc_index)
  */