ARM: OMAP: add detection of omap5-dss

Add detection of omap5-dss nodes so that the related devices get
initialized.

Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
diff --git a/arch/arm/mach-omap2/display.c b/arch/arm/mach-omap2/display.c
index c3f2c66..98e3c59 100644
--- a/arch/arm/mach-omap2/display.c
+++ b/arch/arm/mach-omap2/display.c
@@ -635,6 +635,10 @@
 	if (node)
 		return node;
 
+	node = of_find_compatible_node(NULL, NULL, "ti,omap5-dss");
+	if (node)
+		return node;
+
 	return NULL;
 }