crypto/x86_64cpuid.pl: fix typo in Knights Landing detection.

Thanks to David Benjamin for spotting this!
Reviewed-by: NRich Salz <rsalz@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/4009)

crypto/x86_64cpuid.pl

@@ -150,7 +150,7 @@ OPENSSL_ia32_cpuid:
 .LnotP4:
 	cmp	\$6,%ah
 	jne	.Lnotintel
-	and	\$0x0ffff0f0,%eax
+	and	\$0x0fff0ff0,%eax
 	cmp	\$0x00050670,%eax	# Knights Landing
 	je	.Lknights
 	cmp	\$0x00080650,%eax	# Knights Mill (according to sde)