OMAPDSS: remove uses of dss_runtime_get/put

Now that the omapdss_core device is the parent for all other dss
devices, we don't need to use the dss_runtime_get/put anymore. Instead,
enabling omapdss_core will happen automatically when a child device is
enabled.

Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
diff --git a/drivers/video/omap2/dss/dss.c b/drivers/video/omap2/dss/dss.c
index 7a7ddd8f..900002a 100644
--- a/drivers/video/omap2/dss/dss.c
+++ b/drivers/video/omap2/dss/dss.c
@@ -62,6 +62,9 @@
 #define REG_FLD_MOD(idx, val, start, end) \
 	dss_write_reg(idx, FLD_MOD(dss_read_reg(idx), val, start, end))
 
+static int dss_runtime_get(void);
+static void dss_runtime_put(void);
+
 static struct {
 	struct platform_device *pdev;
 	void __iomem    *base;
@@ -707,7 +710,7 @@
 	clk_put(dss.dss_clk);
 }
 
-int dss_runtime_get(void)
+static int dss_runtime_get(void)
 {
 	int r;
 
@@ -718,7 +721,7 @@
 	return r < 0 ? r : 0;
 }
 
-void dss_runtime_put(void)
+static void dss_runtime_put(void)
 {
 	int r;