drm/panel: boe-th101mb31ig002 : Fix the way to get porch parameters

The current driver can only obtain the porch parameters
of boe-th101mb31ig002. Modify it to obtain the porch
parameters of the panel currently being used.
Reviewed-by: Douglas Anderson <dianders@chromium.org>
Signed-off-by: Zhaoxiong Lv <lvzhaoxiong@huaqin.corp-partner.google.com>
Link: https://lore.kernel.org/r/20240723062615.14796-2-lvzhaoxiong@huaqin.corp-partner.google.comSigned-off-by: Neil Armstrong <neil.armstrong@linaro.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20240723062615.14796-2-lvzhaoxiong@huaqin.corp-partner.google.com

drivers/gpu/drm/panel/panel-boe-th101mb31ig002-28a.c

@@ -312,15 +312,14 @@ static int boe_th101mb31ig002_get_modes(struct drm_panel *panel,
 	struct boe_th101mb31ig002 *ctx = container_of(panel,
 						      struct boe_th101mb31ig002,
 						      panel);
+	const struct drm_display_mode *desc_mode = ctx->desc->modes;
 	struct drm_display_mode *mode;
 
-	mode = drm_mode_duplicate(connector->dev,
-				  &boe_th101mb31ig002_default_mode);
+	mode = drm_mode_duplicate(connector->dev, desc_mode);
 	if (!mode) {
 		dev_err(panel->dev, "Failed to add mode %ux%u@%u\n",
-			boe_th101mb31ig002_default_mode.hdisplay,
-			boe_th101mb31ig002_default_mode.vdisplay,
-			drm_mode_vrefresh(&boe_th101mb31ig002_default_mode));
+			desc_mode->hdisplay, desc_mode->vdisplay,
+			drm_mode_vrefresh(desc_mode));
 		return -ENOMEM;
 	}