ARM: dts: tps65910 backup battery regulator

This patch adds a devicetree node for the backup battery regulator.

Signed-off-by: Markus Pargmann <mpa@pengutronix.de>
Signed-off-by: Tony Lindgren <tony@atomide.com>
diff --git a/arch/arm/boot/dts/tps65910.dtsi b/arch/arm/boot/dts/tps65910.dtsi
index 92693a8..b0ac665 100644
--- a/arch/arm/boot/dts/tps65910.dtsi
+++ b/arch/arm/boot/dts/tps65910.dtsi
@@ -82,5 +82,10 @@
 			reg = <12>;
 			regulator-compatible = "vmmc";
 		};
+
+		vbb_reg: regulator@13 {
+			reg = <13>;
+			regulator-compatible = "vbb";
+		};
 	};
 };