x86: Switch to use DM sysreset driver

This converts all x86 boards over to DM sysreset.

Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Tested-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
diff --git a/arch/x86/dts/edison.dts b/arch/x86/dts/edison.dts
index 9033532..5c80f5c 100644
--- a/arch/x86/dts/edison.dts
+++ b/arch/x86/dts/edison.dts
@@ -85,4 +85,9 @@
 		compatible = "intel,scu-ipc";
 		reg = <0xff009000 0x1000>;
 	};
+
+	reset {
+		compatible = "intel,reset-tangier";
+		u-boot,dm-pre-reloc;
+	};
 };