Merge pull request #1836 from martin-frbg/zen2core

Fix detection of Ryzen2 (missing CORE_ZEN)

Author: martin-frbg

cpuid_x86.c

@@ -2009,6 +2009,8 @@ int get_coretype(void){
 	switch (model) {
 	case 1:
 	  // AMD Ryzen
+	case 8:
+	  // Ryzen 2		
 	  if(support_avx())
 #ifndef NO_AVX2
 	    return CORE_ZEN;