tests: driver_mma8652: vtimer -> xtimer

tests/driver_mma8652/Makefile

@@ -4,7 +4,7 @@ include ../Makefile.tests_common
 FEATURES_REQUIRED = periph_i2c
 
 USEMODULE += mma8652
-USEMODULE += vtimer
+USEMODULE += xtimer
 
 ifneq (,$(TEST_MMA8652_I2C))
   CFLAGS += -DTEST_MMA8652_I2C=$(TEST_MMA8652_I2C)

tests/driver_mma8652/main.c

@@ -29,7 +29,7 @@
 
 #include <stdio.h>
 
-#include "vtimer.h"
+#include "xtimer.h"
 #include "mma8652.h"
 
 #define SLEEP       (1000 * 1000U)
@@ -68,7 +68,7 @@ int main(void)
     while (1) {
         mma8652_read(&dev, &x, &y, &z, &status);
         printf("Acceleration, raw: X: %d Y: %d Z: %d S: %2x\n", x, y, z, status);
-        vtimer_usleep(SLEEP);
+        xtimer_usleep(SLEEP);
     }
 
     return 0;