OMAP: DSS2: move get_recommended_bpp()

Move get_recommended_bpp() from omap_dss_device to omap_dss_driver.

This is part of a larger patch-set, which moves the control from omapdss
driver to the display driver.

Signed-off-by: Tomi Valkeinen <tomi.valkeinen@nokia.com>
diff --git a/drivers/video/omap2/dss/display.c b/drivers/video/omap2/dss/display.c
index 3888c19..af8aae7 100644
--- a/drivers/video/omap2/dss/display.c
+++ b/drivers/video/omap2/dss/display.c
@@ -324,11 +324,8 @@
 	*fifo_low = fifo_size - burst_size_bytes;
 }
 
-static int default_get_recommended_bpp(struct omap_dss_device *dssdev)
+int omapdss_default_get_recommended_bpp(struct omap_dss_device *dssdev)
 {
-	if (dssdev->panel.recommended_bpp)
-		return dssdev->panel.recommended_bpp;
-
 	switch (dssdev->type) {
 	case OMAP_DISPLAY_TYPE_DPI:
 		if (dssdev->phy.dpi.data_lines == 24)
@@ -350,6 +347,7 @@
 		BUG();
 	}
 }
+EXPORT_SYMBOL(omapdss_default_get_recommended_bpp);
 
 /* Checks if replication logic should be used. Only use for active matrix,
  * when overlay is in RGB12U or RGB16 mode, and LCD interface is
@@ -413,8 +411,6 @@
 		return;
 	}
 
-	dssdev->get_recommended_bpp = default_get_recommended_bpp;
-
 	switch (dssdev->type) {
 	case OMAP_DISPLAY_TYPE_DPI:
 		r = dpi_init_display(dssdev);