Fix stupid switch stmt mess-up that broke emulation

of move to/from debug register.

xen/arch/x86/traps.c

@@ -843,6 +843,11 @@ static int emulate_privileged_op(struct cpu_user_regs *regs)
             UNLOCK_BIGLOCK(v->domain);
             break;
 
+        default:
+            goto fail;
+        }
+        break;
+
     case 0x23: /* MOV <reg>,DR? */
         opcode = insn_fetch(u8, 1, eip);
         modrm_reg |= (opcode >> 3) & 7;
@@ -852,11 +857,6 @@ static int emulate_privileged_op(struct cpu_user_regs *regs)
             goto fail;
         break;
 
-        default:
-            goto fail;
-        }
-        break;
-
     case 0x30: /* WRMSR */
         /* Ignore the instruction if unprivileged. */
         if ( !IS_PRIV(v->domain) )