ARM: OMAP2+: display: detect DRA7 DSS

Add platform code to detect DRA7 DSS.
Signed-off-by: NTomi Valkeinen <tomi.valkeinen@ti.com>
Acked-by: NTony Lindgren <tony@atomide.com>

arch/arm/mach-omap2/display.c

@@ -287,6 +287,8 @@ static enum omapdss_version __init omap_display_get_version(void)
 		return OMAPDSS_VER_OMAP5;
 	else if (soc_is_am43xx())
 		return OMAPDSS_VER_AM43xx;
+	else if (soc_is_dra7xx())
+		return OMAPDSS_VER_DRA7xx;
 	else
 		return OMAPDSS_VER_UNKNOWN;
 }
@@ -573,6 +575,7 @@ static const char * const omapdss_compat_names[] __initconst = {
 	"ti,omap3-dss",
 	"ti,omap4-dss",
 	"ti,omap5-dss",
+	"ti,dra7-dss",
 };
 
 struct device_node * __init omapdss_find_dss_of_node(void)