video: fbdev: hgafb: Fix kernel-doc warnings

Fix kernel-doc comments.

v2:
  - Updated subject (Lee)

v3:
  - Add space after ':' (Randy)
  - Fix name of function in comment

Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Acked-by: Randy Dunlap <rdunlap@infradead.org>
Cc: Ferenc Bakonyi <fero@drama.obuda.kando.hu>
Cc: linux-nvidia@lists.surfsouth.com
Cc: Lee Jones <lee.jones@linaro.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20201206190247.1861316-2-sam@ravnborg.org

drivers/video/fbdev/hgafb.c

@@ -357,8 +357,8 @@ error:
 
 /**
  *	hgafb_open - open the framebuffer device
- *	@info:pointer to fb_info object containing info for current hga board
+ *	@info: pointer to fb_info object containing info for current hga board
- *	@int:open by console system or userland.
+ *	@init: open by console system or userland.
  */
 
 static int hgafb_open(struct fb_info *info, int init)
@@ -370,9 +370,9 @@ static int hgafb_open(struct fb_info *info, int init)
 }
 
 /**
- *	hgafb_open - open the framebuffer device
+ *	hgafb_release - open the framebuffer device
- *	@info:pointer to fb_info object containing info for current hga board
+ *	@info: pointer to fb_info object containing info for current hga board
- *	@int:open by console system or userland.
+ *	@init: open by console system or userland.
  */
 
 static int hgafb_release(struct fb_info *info, int init)