ARM: OMAP2+: Make the omapdss_find_dss_of_node() function static

The omapdss_find_dss_of_node() function isn't used outside of its
compilation unit, make it static.
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>

arch/arm/mach-omap2/display.c

@@ -317,7 +317,7 @@ static const char * const omapdss_compat_names[] __initconst = {
 	"ti,dra7-dss",
 };
 
-struct device_node * __init omapdss_find_dss_of_node(void)
+static struct device_node * __init omapdss_find_dss_of_node(void)
 {
 	struct device_node *node;
 	int i;

arch/arm/mach-omap2/display.h

@@ -31,6 +31,4 @@ int omap_init_vrfb(void);
 int omap_init_fb(void);
 int omap_init_vout(void);
 
-struct device_node * __init omapdss_find_dss_of_node(void);
-
 #endif