drm: omapdrm: Don't forward set_min_bus_tput() to no-op platform code

The OMAP implementation of the set_min_bus_tput() API is a no-op.
There's no point in forwarding the driver calls to the platform code.
Remove the use of the related platform data callback, but keep the
internal function as a reminder that the feature will need to be
implemented when the OMAP platform will provide support.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>

drivers/gpu/drm/omapdrm/dss/core.c

@@ -50,16 +50,6 @@ enum omapdss_version omapdss_get_version(void)
 }
 EXPORT_SYMBOL(omapdss_get_version);
 
-int dss_set_min_bus_tput(struct device *dev, unsigned long tput)
-{
-	struct omap_dss_board_info *pdata = core.pdev->dev.platform_data;
-
-	if (pdata->set_min_bus_tput)
-		return pdata->set_min_bus_tput(dev, tput);
-	else
-		return 0;
-}
-
 #if defined(CONFIG_OMAP2_DSS_DEBUGFS)
 static int dss_debug_show(struct seq_file *s, void *unused)
 {

drivers/gpu/drm/omapdrm/dss/dss.h

@@ -219,7 +219,12 @@ struct seq_file;
 struct platform_device;
 
 /* core */
-int dss_set_min_bus_tput(struct device *dev, unsigned long tput);
+static inline int dss_set_min_bus_tput(struct device *dev, unsigned long tput)
+{
+	/* To be implemented when the OMAP platform will provide this feature */
+	return 0;
+}
+
 int dss_debugfs_create_file(const char *name, void (*write)(struct seq_file *));
 
 static inline bool dss_mgr_is_lcd(enum omap_channel id)