mstrool: only use intel targets for actual intel CPUs

VIA c3 & C7 use the the family of 0x6 and model 10, but are not quite
Pentium III.

Change-Id: I85e9853b42cfd20db46db0bd244620d6813bc826
Signed-off-by: Lubomir Rintel <lkundrak@v3.sk>
Reviewed-on: https://review.coreboot.org/18256
Reviewed-by: Martin Roth <martinroth@google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

util/msrtool/intel_pentium4_later.c

@@ -16,7 +16,8 @@
 #include "msrtool.h"
 
 int intel_pentium4_later_probe(const struct targetdef *target, const struct cpuid_t *id) {
-	return ((0xf == id->family) && (
+	return ((VENDOR_INTEL == id->vendor) &&
+		(0xf == id->family) && (
 		(0x3 == id->model) ||
 		(0x4 == id->model)
 		));