arch/x86/smbios: use cpu_cpuid_extended_level instead of open coding it

Signed-off-by: Felix Held <felix-coreboot@felixheld.de>
Change-Id: Ice15f0ce591104a2ace186f9049748219c2bc097
Reviewed-on: https://review.coreboot.org/c/coreboot/+/73141
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Elyes Haouas <ehaouas@noos.fr>
diff --git a/src/arch/x86/smbios.c b/src/arch/x86/smbios.c
index c505bb0..f094825 100644
--- a/src/arch/x86/smbios.c
+++ b/src/arch/x86/smbios.c
@@ -120,8 +120,8 @@
 	const char *str = "Unknown Processor Name";
 	if (cpu_have_cpuid()) {
 		int i;
-		struct cpuid_result res = cpuid(0x80000000);
-		if (res.eax >= 0x80000004) {
+		struct cpuid_result res;
+		if (cpu_cpuid_extended_level() >= 0x80000004) {
 			int j = 0;
 			for (i = 0; i < 3; i++) {
 				res = cpuid(0x80000002 + i);