virSysinfoRead: Simplify #ifdef underbush

Signed-off-by: NMichal Privoznik <mprivozn@redhat.com>

src/util/virsysinfo.c

@@ -1212,13 +1212,12 @@ virSysinfoRead(void)
     return virSysinfoReadARM();
 #elif defined(__s390__) || defined(__s390x__)
     return virSysinfoReadS390();
-#elif defined(WIN32) || \
-    !(defined(__x86_64__) || \
+#elif !defined(WIN32) && \
+    (defined(__x86_64__) || \
      defined(__i386__) || \
-      defined(__amd64__) || \
-      defined(__arm__) || \
-      defined(__aarch64__) || \
-      defined(__powerpc__))
+     defined(__amd64__))
+    return virSysinfoReadX86();
+#else /* WIN32 || not supported arch */
     /*
      * this can probably be extracted from Windows using API or registry
      * http://www.microsoft.com/whdc/system/platform/firmware/SMBIOS.mspx
@@ -1226,9 +1225,7 @@ virSysinfoRead(void)
     virReportSystemError(ENOSYS, "%s",
                          _("Host sysinfo extraction not supported on this platform"));
     return NULL;
-#else /* !WIN32 && x86 */
-    return virSysinfoReadX86();
-#endif /* !WIN32 && x86 */
+#endif /* WIN32 || not supported arch */
 }