drm/panel: simple: Add missing display timing flags for KOE TX26D202VM0BWA

BugLink: https://bugs.launchpad.net/bugs/2073765

[ Upstream commit 37ce99b77762256ec9fda58d58fd613230151456 ]

KOE TX26D202VM0BWA panel spec indicates the DE signal is active high in
timing chart, so add DISPLAY_FLAGS_DE_HIGH flag in display timing flags.
This aligns display_timing with panel_desc.

Fixes: 8a07052 ("drm/panel: simple: Add support for KOE TX26D202VM0BWA panel")
Signed-off-by: Liu Ying <victor.liu@nxp.com>
Reviewed-by: Neil Armstrong <neil.armstrong@linaro.org>
Link: https://lore.kernel.org/r/20240624015612.341983-1-victor.liu@nxp.com
Signed-off-by: Neil Armstrong <neil.armstrong@linaro.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20240624015612.341983-1-victor.liu@nxp.com
Signed-off-by: Sasha Levin <sashal@kernel.org>
Signed-off-by: Portia Stephens <portia.stephens@canonical.com>
Signed-off-by: Roxana Nicolescu <roxana.nicolescu@canonical.com>

Author: Liu Ying

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

@@ -2873,6 +2873,7 @@ static const struct display_timing koe_tx26d202vm0bwa_timing = {
 	.vfront_porch = { 3, 5, 10 },
 	.vback_porch = { 2, 5, 10 },
 	.vsync_len = { 5, 5, 5 },
+	.flags = DISPLAY_FLAGS_DE_HIGH,
 };
 
 static const struct panel_desc koe_tx26d202vm0bwa = {