Fix compiler warnings in Nanostack HAL

Fix compiler warnings:
 -"warning: 'size' argument to memset is '0'"
 -"warning: implicit declaration of function"

Author: Arto Kinnunen

features/nanostack/nanostack-hal-mbed-cmsis-rtos/arm_hal_fhss_timer.cpp

@@ -14,6 +14,7 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
+
 #include "ns_types.h"
 #include "fhss_api.h"
 #include "fhss_config.h"
@@ -70,7 +71,7 @@ static fhss_timeout_s *allocate_timeout(void)
 {
     for (int i = 0; i < NUMBER_OF_SIMULTANEOUS_TIMEOUTS; i++) {
         if (fhss_timeout[i].fhss_timer_callback == NULL) {
-            memset(&fhss_timeout[i], sizeof(fhss_timeout_s), 0);
+            memset(&fhss_timeout[i], 0, sizeof(fhss_timeout_s));
             return &fhss_timeout[i];
         }
     }
@@ -170,3 +171,4 @@ fhss_timer_t fhss_functions = {
     .fhss_get_timestamp = platform_fhss_timestamp_read,
     .fhss_resolution_divider = 1
 };
+

features/nanostack/nanostack-hal-mbed-cmsis-rtos/arm_hal_random.c

@@ -19,6 +19,12 @@
 
 #include "mbedtls/entropy_poll.h"
 
+#ifdef MBEDTLS_ENTROPY_HARDWARE_ALT
+#if defined(MBEDTLS_PLATFORM_C)
+#include "mbedtls/platform.h"
+#endif
+#endif
+
 void arm_random_module_init(void)
 {
 }