x86: cougarcanyon2: Enable CPU driver and SMP support

This enables the 206ax cpu driver on Intel Cougar Canyon 2 board,
so that SMP can be supported too.

Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

arch/x86/dts/cougarcanyon2.dts

@@ -27,6 +27,39 @@
 		stdout-path = "/serial";
 	};
 
+	cpus {
+		#address-cells = <1>;
+		#size-cells = <0>;
+
+		cpu@0 {
+			device_type = "cpu";
+			compatible = "intel,core-gen3";
+			reg = <0>;
+			intel,apic-id = <0>;
+		};
+
+		cpu@1 {
+			device_type = "cpu";
+			compatible = "intel,core-gen3";
+			reg = <1>;
+			intel,apic-id = <1>;
+		};
+
+		cpu@2 {
+			device_type = "cpu";
+			compatible = "intel,core-gen3";
+			reg = <2>;
+			intel,apic-id = <2>;
+		};
+
+		cpu@3 {
+			device_type = "cpu";
+			compatible = "intel,core-gen3";
+			reg = <3>;
+			intel,apic-id = <3>;
+		};
+	};
+
 	microcode {
 		update@0 {
 #include "microcode/m12306a2_00000008.dtsi"

configs/cougarcanyon2_defconfig

@@ -5,12 +5,14 @@ CONFIG_DEFAULT_DEVICE_TREE="cougarcanyon2"
 CONFIG_TARGET_COUGARCANYON2=y
 # CONFIG_HAVE_INTEL_ME is not set
 # CONFIG_ENABLE_MRC_CACHE is not set
+CONFIG_SMP=y
 CONFIG_USE_BOOTARGS=y
 CONFIG_BOOTARGS="root=/dev/sdb3 init=/sbin/init rootwait ro"
 CONFIG_SYS_CONSOLE_INFO_QUIET=y
 CONFIG_DISPLAY_BOARDINFO_LATE=y
 CONFIG_LAST_STAGE_INIT=y
 CONFIG_HUSH_PARSER=y
+CONFIG_CMD_CPU=y
 # CONFIG_CMD_FLASH is not set
 CONFIG_CMD_GPIO=y
 CONFIG_CMD_PART=y
@@ -32,6 +34,7 @@ CONFIG_ISO_PARTITION=y
 CONFIG_EFI_PARTITION=y
 CONFIG_REGMAP=y
 CONFIG_SYSCON=y
+CONFIG_CPU=y
 CONFIG_SYS_NS16550=y
 CONFIG_SPI=y
 CONFIG_USB_STORAGE=y