samples/board/x86_info: move to tests directory

This application's primary purpose is to provide some useful data to
the author of an x86 board support package for Zephyr-- it's not a
good sample.  It's not a good test either, but as a test it at least
prevents regressions in multiboot/ACPI builds.

Signed-off-by: Charles E. Youse <charles.youse@intel.com>

samples/boards/x86_info/sample.yaml

@@ -1,6 +0,0 @@
-sample:
-  description: Tool to illustrate the use of some x86-specific kernel
-    interfaces, and also to provide information about x86-based platforms
-    (memory map, CPU information, timer frequencies) useful when bringing
-    up new boards.
-  name: x86 platform information tool

tests/arch/x86/info/CMakeLists.txt

@@ -1,7 +1,7 @@
 # SPDX-License-Identifier: Apache-2.0
 # Copyright (c) 2019 Intel Corp.
 
-cmake_minimum_required(VERSION 3.8.2)
+cmake_minimum_required(VERSION 3.13.1)
 
 include($ENV{ZEPHYR_BASE}/cmake/app/boilerplate.cmake NO_POLICY_SCOPE)
 project(x86_info)

tests/arch/x86/info/src/main.c

@@ -4,7 +4,7 @@
  */
 
 #include <zephyr.h>
-#include "x86_info.h"
+#include "info.h"
 
 __weak void multiboot(void)
 {
@@ -18,12 +18,12 @@ __weak void acpi(void)
 
 void main(void)
 {
-	printk("\n\nx86_info: the Zephyr x86 platform information tool\n\n");
+	printk("\n\ninfo: the Zephyr x86 platform information tool\n\n");
 
 	multiboot();
 	memmap();
 	acpi();
 	timer();
 
-	printk("x86_info: complete\n");
+	printk("info: complete\n");
 }

tests/arch/x86/info/testcase.yaml

@@ -0,0 +1,4 @@
+tests:
+  arch.x86.info:
+    arch_whitelist: x86
+    platform_whitelist: up_squared