drm: Fix htmldocs indentation warning w/ DP AUX power requirements

Two blank lines are needed to make the rst valid.

Fixes: 69ef4a192b ("drm: Document the power requirements for DP AUX transfers")
Reported-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Douglas Anderson <dianders@chromium.org>
Acked-by: Sam Ravnborg <sam@ravnborg.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20220611095445.1.I534072d346b1ebbf0db565b714de9b65cbb24651@changeid

include/drm/display/drm_dp_helper.h

@@ -372,8 +372,10 @@ struct drm_dp_aux {
 	 * Also note that this callback can be called no matter the
 	 * state @dev is in and also no matter what state the panel is
 	 * in. It's expected:
+	 *
 	 * - If the @dev providing the AUX bus is currently unpowered then
 	 *   it will power itself up for the transfer.
+	 *
 	 * - If we're on eDP (using a drm_panel) and the panel is not in a
 	 *   state where it can respond (it's not powered or it's in a
 	 *   low power state) then this function may return an error, but