Remove cpuid assert because of valigrind

Stolen from Debian eglibc_2.11.3-3.diff.gz.

<https://bugs.gentoo.org/show_bug.cgi?id=345873>

diff --git a/sysdeps/x86_64/cacheinfo.c b/sysdeps/x86_64/cacheinfo.c
index 5422037..1debf12 100644
--- a/sysdeps/x86_64/cacheinfo.c
+++ b/sysdeps/x86_64/cacheinfo.c
@@ -254,7 +254,13 @@ intel_check_word (int name, unsigned int value, bool *has_level_2,
 static long int __attribute__ ((noinline))
 handle_intel (int name, unsigned int maxidx)
 {
-  assert (maxidx >= 2);
+  if (maxidx < 2)
+    {
+      /* This should never happen as all Intel i686 CPU support a CPUID
+	 level of 2 minimum.  However valgrind sometimes load the i686
+	 library with a P55C CPUID.  Return 0 in that case. */
+      return 0;
+    }
 
   /* OK, we can use the CPUID instruction to get all info about the
      caches.  */