drm/connector: Fix kerneldoc warning in HDR_OUTPUT_METADATA description

Fixes the following warning:
../drivers/gpu/drm/drm_connector.c:981: WARNING: Definition list ends without a blank line; unexpected unindent.

Fixes: a09db88 ("drm: Fix docbook warnings in hdr metadata helper structures")
Cc: Shashank Sharma <[email protected]>
Cc: Ville Syrjä <[email protected]>
Cc: Maarten Lankhorst <[email protected]>
Cc: Maxime Ripard <[email protected]>
Cc: Sean Paul <[email protected]>
Cc: David Airlie <[email protected]>
Cc: Daniel Vetter <[email protected]>
Cc: Bartlomiej Zolnierkiewicz <[email protected]>
Cc: "Ville Syrjä" <[email protected]>
Cc: Hans Verkuil <[email protected]>
Cc: [email protected]
Cc: [email protected]
Cc: Sean Paul <[email protected]> (v1)
Cc: Uma Shankar <[email protected]>
Cc: Daniel Vetter <[email protected]>
Cc: "Ville Syrjälä" <[email protected]>
Reviewed-by: Alex Deucher <[email protected]>
Signed-off-by: Sean Paul <[email protected]>
Link: https://patchwork.freedesktop.org/patch/msgid/[email protected]

Author: atseanpaul

drivers/gpu/drm/drm_connector.c

@@ -978,6 +978,7 @@ static const struct drm_prop_enum_list hdmi_colorspaces[] = {
  *	Userspace will be responsible to do Tone mapping operation in case:
  *		- Some layers are HDR and others are SDR
  *		- HDR layers luminance is not same as sink
+ *
  *	It will even need to do colorspace conversion and get all layers
  *	to one common colorspace for blending. It can use either GL, Media
  *	or display engine to get this done based on the capabilties of the