ui: Migrate xemu_get_os_platform to SDL_GetPlatform

ui/xemu-os-utils.h

@@ -30,22 +30,6 @@ const char *xemu_get_os_info(void);
 #include <cpuid.h>
 #endif
 
-static inline const char *xemu_get_os_platform(void)
-{
-    const char *platform_name;
-
-#if defined(__linux__)
-    platform_name = "Linux";
-#elif defined(_WIN32)
-    platform_name = "Windows";
-#elif defined(__APPLE__)
-    platform_name = "macOS";
-#else
-    platform_name = "Unknown";
-#endif
-    return platform_name;
-}
-
 static inline const char *xemu_get_cpu_info(void)
 {
     const char *cpu_info = "";

ui/xui/compat.cc

@@ -35,7 +35,7 @@ CompatibilityReporter::CompatibilityReporter()
     report.xemu_version = xemu_version;
     report.xemu_commit = xemu_commit;
     report.xemu_date = xemu_date;
-    report.os_platform = xemu_get_os_platform();
+    report.os_platform = SDL_GetPlatform();
     report.os_version = xemu_get_os_info();
     report.cpu = xemu_get_cpu_info();
     dirty = true;

ui/xui/main-menu.cc

@@ -1624,7 +1624,7 @@ void MainMenuAboutView::Draw()
             "CPU:          %s\nOS Platform:  %s\nOS Version:   "
             "%s\nManufacturer: %s\n"
             "GPU Model:    %s\nDriver:       %s\nShader:       %s",
-            xemu_get_cpu_info(), xemu_get_os_platform(), xemu_get_os_info(),
+            xemu_get_cpu_info(), SDL_GetPlatform(), xemu_get_os_info(),
             gl_vendor, gl_renderer, gl_version, gl_shader_version);
     }