x86: galileo: Enable CPU driver

Add a cpu node in the device tree and enable CPU driver.

Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
diff --git a/arch/x86/dts/galileo.dts b/arch/x86/dts/galileo.dts
index f784c50..da3cbff 100644
--- a/arch/x86/dts/galileo.dts
+++ b/arch/x86/dts/galileo.dts
@@ -29,6 +29,18 @@
 		stdout-path = &pciuart0;
 	};
 
+	cpus {
+		#address-cells = <1>;
+		#size-cells = <0>;
+
+		cpu@0 {
+			device_type = "cpu";
+			compatible = "cpu-x86";
+			reg = <0>;
+			intel,apic-id = <0>;
+		};
+	};
+
 	tsc-timer {
 		clock-frequency = <400000000>;
 	};