fix conditional compilation

git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@594 42af7a65-404d-4744-a932-0658087f49c3

arch/z16/src/common/up_initialize.c

@@ -93,7 +93,7 @@ FAR chipreg_t *current_regs;
  *
  ****************************************************************************/
 
-#if defined(CONFIG_ARCH_CALIBRATION) & defined(CONFIG_DEBUG) && defined(CONFIG_ARCH_LOWPUTC)
+#if defined(CONFIG_ARCH_CALIBRATION) && defined(CONFIG_DEBUG) && defined(CONFIG_ARCH_LOWPUTC)
 static void up_calibratedelay(void)
 {
   int i;