ARM: dts: OMAP5+: Add support for bandgap sensor in SPL

Mark bandgap node as uboot,dm-spl so that it can be accessed in spl

Signed-off-by: Faiz Abbas <faiz_abbas@ti.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Tom Rini <trini@konsulko.com>

arch/arm/dts/omap5-u-boot.dtsi

@@ -18,6 +18,10 @@
 		ocp2scp@4a090000 {
 			compatible = "ti,omap-ocp2scp", "simple-bus";
 		};
+
+		bandgap@4a0021e0 {
+			u-boot,dm-spl;
+		};
 	};
 };