OMAPDSS: add output->name

Add name field to omapdss's outputs so that in the following patches
panels refer to the output by their name. The name also helps debugging.

Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
Reviewed-by: Archit Taneja <archit@ti.com>
diff --git a/drivers/video/omap2/dss/sdi.c b/drivers/video/omap2/dss/sdi.c
index 62b5374..c27b58a 100644
--- a/drivers/video/omap2/dss/sdi.c
+++ b/drivers/video/omap2/dss/sdi.c
@@ -278,6 +278,7 @@
 	out->pdev = pdev;
 	out->id = OMAP_DSS_OUTPUT_SDI;
 	out->type = OMAP_DISPLAY_TYPE_SDI;
+	out->name = "sdi.0";
 
 	dss_register_output(out);
 }