cpu: cc430: remove hwtimer support, switch gpioint to xtimer

cpu/cc430/cc430-gpioint.c

@@ -20,7 +20,7 @@
 #include "bitarithm.h"
 #include "cpu.h"
 #include "irq.h"
-#include "hwtimer.h"
+#include "xtimer.h"
 
 /** min and max portnumber to generate interrupts */
 #define PORTINT_MIN     (1)
@@ -163,10 +163,10 @@ interrupt(PORT1_VECTOR) __attribute__((naked)) port1_isr(void)
     /* check interrupt source */
     if (debounce_flags[0] & p1ifg) {
         /* check if bouncing */
-        diff = hwtimer_now() - debounce_time[0][ifg_num];
+        diff = xtimer_now() - debounce_time[0][ifg_num];
 
         if (diff > DEBOUNCE_TIMEOUT) {
-            debounce_time[0][ifg_num] = hwtimer_now();
+            debounce_time[0][ifg_num] = xtimer_now();
 
             if (cb[0][ifg_num] != NULL) {
                 cb[0][ifg_num]();
@@ -208,10 +208,10 @@ interrupt(PORT2_VECTOR) __attribute__((naked)) port2_isr(void)
     /* check interrupt source */
     if (debounce_flags[1] & p2ifg) {
         /* check if bouncing */
-        diff = hwtimer_now() - debounce_time[1][ifg_num];
+        diff = xtimer_now() - debounce_time[1][ifg_num];
 
         if (diff > DEBOUNCE_TIMEOUT) {
-            debounce_time[1][ifg_num] = hwtimer_now();
+            debounce_time[1][ifg_num] = xtimer_now();
             c1++;
 
             if (cb[1][ifg_num] != NULL) {