ARM: dts: imx51: Add tigerp support

As per the i.MX51 Reference Manual add an entry for the
'tigerp' region in the device tree.

This is needed for accessing the ARM_GPC register to set the
DBGEN bit, so that the debug clocks can be turned on.
Signed-off-by: Fabio Estevam <fabio.estevam@nxp.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>

arch/arm/boot/dts/imx51.dtsi

@@ -451,6 +451,11 @@ iim: iim@83f98000 {
 				clocks = <&clks IMX5_CLK_IIM_GATE>;
 			};
 
+			tigerp: tigerp@83fa0000 {
+				compatible = "fsl,imx51-tigerp";
+				reg = <0x83fa0000 0x28>;
+			};
+
 			owire: owire@83fa4000 {
 				compatible = "fsl,imx51-owire", "fsl,imx21-owire";
 				reg = <0x83fa4000 0x4000>;