ntdll: Use the correct machine when loading ntdll on ARM64EC.

dlls/ntdll/unix/loader.c

@@ -1641,6 +1641,7 @@ static void load_ntdll(void)
     static WCHAR path[] = {'\\','?','?','\\','C',':','\\','w','i','n','d','o','w','s','\\',
                            's','y','s','t','e','m','3','2','\\','n','t','d','l','l','.','d','l','l',0};
     const char *pe_dir = get_pe_dir( current_machine );
+    USHORT machine = current_machine;
     unsigned int status;
     SECTION_IMAGE_INFORMATION info;
     OBJECT_ATTRIBUTES attr;
@@ -1654,7 +1655,9 @@ static void load_ntdll(void)
 
     if (build_dir) asprintf( &name, "%s%s/ntdll.dll", ntdll_dir, pe_dir );
     else asprintf( &name, "%s%s/ntdll.dll", dll_dir, pe_dir );
-    status = open_builtin_pe_file( name, &attr, &module, &size, &info, 0, 0, current_machine, FALSE );
+
+    if (is_arm64ec()) machine = main_image_info.Machine;
+    status = open_builtin_pe_file( name, &attr, &module, &size, &info, 0, 0, machine, FALSE );
     if (status == STATUS_DLL_NOT_FOUND)
     {
         free( name );