omap3_dss: define DSS_ONOFF

Add DSS_ONOFF to polarity defines

Cc: Tom Rini <trini@ti.com>
Cc: Anatolij Gustschin <agust@denx.de>
Cc: Igor Grinberg <grinberg@compulab.co.il>
Signed-off-by: Nikita Kiryanov <nikita@compulab.co.il>
Acked-by: Igor Grinberg <grinberg@compulab.co.il>
Acked-by: Anatolij Gustschin <agust@denx.de>
diff --git a/arch/arm/include/asm/arch-omap3/dss.h b/arch/arm/include/asm/arch-omap3/dss.h
index ae0babf..8bf6b48 100644
--- a/arch/arm/include/asm/arch-omap3/dss.h
+++ b/arch/arm/include/asm/arch-omap3/dss.h
@@ -178,10 +178,11 @@
 #define LCD_INTERFACE_24_BIT	3
 
 /* Polarity */
-#define DSS_IVS	(1 << 12)
-#define DSS_IHS	(1 << 13)
-#define DSS_IPC	(1 << 14)
-#define DSS_IEO	(1 << 15)
+#define DSS_IVS		(1 << 12)
+#define DSS_IHS		(1 << 13)
+#define DSS_IPC		(1 << 14)
+#define DSS_IEO		(1 << 15)
+#define DSS_ONOFF	(1 << 17)
 
 /* GFX format */
 #define GFXFORMAT_BITMAP1		(0x0 << 1)