staging: omap-thermal: add DT example for OMAP54xx devices

Update documentation with DT example for OMAP54xx devices.
Signed-off-by: NEduardo Valentin <eduardo.valentin@ti.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/omap-thermal/omap_bandgap.txt

@@ -49,3 +49,12 @@ bandgap {
 	interrupts = <0 126 4>; /* talert */
 	ti,tshut-gpio = <86>;
 };
+
+OMAP5430:
+bandgap {
+	reg = <0x4a0021e0 0xc
+		0x4a00232c 0xc
+		0x4a002380 0x2c
+		0x4a0023C0 0x3c>;
+	compatible = "ti,omap5430-bandgap";
+};