x86: support Atom Tremont

Add model 0x86 to relevant switch() statements, as per SDM 069 Vol 4.

Signed-off-by: Jan Beulich <jbeulich@suse.com>
Acked-by: Andrew Cooper <andrew.cooper3@citrix.com>

xen/arch/x86/acpi/cpu_idle.c

@@ -238,6 +238,8 @@ static void do_get_hw_residencies(void *arg)
     case 0x5F:
     /* Goldmont Plus */
     case 0x7A:
+    /* Tremont */
+    case 0x86:
         GET_PC2_RES(hw_res->pc2);
         GET_PC3_RES(hw_res->pc3);
         GET_PC6_RES(hw_res->pc6);

xen/arch/x86/hvm/vmx/vmx.c

@@ -2778,6 +2778,8 @@ static const struct lbr_info *last_branch_msr_get(void)
         case 0x66:
         /* Goldmont Plus */
         case 0x7a:
+        /* Tremont */
+        case 0x86:
         /* Kaby Lake */
         case 0x8e: case 0x9e:
             return sk_lbr;