Merge pull request ARMmbed#12243 from 0xc0170/fix_12242_recreate

Add timer shutdown after time stop on deinit

Author: 0xc0170

features/FEATURE_BLE/targets/TARGET_NORDIC/TARGET_NORDIC_CORDIO/TARGET_NRF5x/stack/sources/pal_bb_ble.c

@@ -919,6 +919,7 @@ void PalBbBleDisable(void)
 
   /* stop timer */
   NRF_TIMER0->TASKS_STOP = 1;
+  NRF_TIMER0->TASKS_SHUTDOWN = 1;
 
   /* disable PPI channels */
   NRF_PPI->CHENCLR = PPI_CHENCLR_CH14_Msk;   /* Chan 14: COMPARE[0] -> TXEN/RXEN */

features/FEATURE_BLE/targets/TARGET_NORDIC/TARGET_NORDIC_CORDIO/TARGET_NRF5x/stack/sources/pal_timer.c

@@ -152,6 +152,7 @@ void PalTimerDeInit(void)
 
   /* stop timer */
   NRF_TIMER2->TASKS_STOP  = 1;
+  NRF_TIMER2->TASKS_SHUTDOWN  = 1;
 
   palTimerCb.state = PAL_TIMER_STATE_UNINIT;
 }