drm/panel-edp: Fix delays for Innolux N116BCA-EA1

Commit 52824ca4 ("drm/panel-edp: Better describe eDP panel delays")
clarified the various delays used for eDP panels, tying them to the eDP
panel timing diagram.

For Innolux N116BCA-EA1, .prepare_to_enable would be:

    t4_min + t5_min + t6_min + max(t7_max, t8_min)

Since t4_min and t5_min are both 0, the panel can use either .enable or
.prepare_to_enable.

As .enable is better defined, switch to using .enable for this panel.

Also add .disable = 50, based on the datasheet's t9_min value. This
effectively makes the delays the same as delay_200_500_e80_d50.

Cc: Douglas Anderson <dianders@chromium.org>
Fixes: 51d35631 ("drm/panel-simple: Add N116BCA-EA1")
Signed-off-by: NChen-Yu Tsai <wenst@chromium.org>
Reviewed-by: NDouglas Anderson <dianders@chromium.org>
Signed-off-by: NDouglas Anderson <dianders@chromium.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20220908085454.1024167-1-wenst@chromium.org

drivers/gpu/drm/panel/panel-edp.c

@@ -1295,7 +1295,8 @@ static const struct panel_desc innolux_n116bca_ea1 = {
 	},
 	.delay = {
 		.hpd_absent = 200,
-		.prepare_to_enable = 80,
+		.enable = 80,
+		.disable = 50,
 		.unprepare = 500,
 	},
 };