drm: Remove pointless '-' characters from drm_fb_helper documentation

Signed-off-by: NVille Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: NDave Airlie <airlied@redhat.com>

include/drm/drm_fb_helper.h

@@ -50,14 +50,14 @@ struct drm_fb_helper_surface_size {
 
 /**
  * struct drm_fb_helper_funcs - driver callbacks for the fbdev emulation library
- * @gamma_set: - Set the given gamma lut register on the given crtc.
- * @gamma_get: - Read the given gamma lut register on the given crtc, used to
+ * @gamma_set: Set the given gamma lut register on the given crtc.
+ * @gamma_get: Read the given gamma lut register on the given crtc, used to
  *             save the current lut when force-restoring the fbdev for e.g.
  *             kdbg.
- * @fb_probe: - Driver callback to allocate and initialize the fbdev info
+ * @fb_probe: Driver callback to allocate and initialize the fbdev info
  *            structure. Futhermore it also needs to allocate the drm
  *            framebuffer used to back the fbdev.
- * @initial_config: - Setup an initial fbdev display configuration
+ * @initial_config: Setup an initial fbdev display configuration
  *
  * Driver callbacks used by the fbdev emulation helper library.
  */