ARM: dts: omap3-gta04: Fix backup-battery charging in devicetree file.

Fix attribute names.
Signed-off-by: H. Nikolaus Schaller <hns@goldelico.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>

arch/arm/boot/dts/omap3-gta04.dtsi

@@ -377,8 +377,8 @@ &uart3 {
 };
 
 &charger {
-	bb_uvolt = <3200000>;
-	bb_uamp = <150>;
+	ti,bb-uvolt = <3200000>;
+	ti,bb-uamp = <150>;
 };
 
 /* spare */