Fix IRQ management in FreeRTOS to avoid crash and deadlock in BLE stack.

src/FreeRTOS/port_cmsis.c

@@ -354,4 +354,24 @@ static void vPortEnableVFP( void )
         configASSERT( NVIC_GetPriorityGrouping() <= ulMaxPRIGROUPValue );
     }
 
+uint32_t ulSetInterruptMaskFromISR( void )
+{
+  __asm volatile (
+  " mrs r0, PRIMASK	\n"
+  " cpsid i			\n"
+  " bx lr				  "
+  ::: "memory"
+  );
+}
+/*-----------------------------------------------------------*/
+
+void vClearInterruptMaskFromISR( __attribute__( ( unused ) ) uint32_t ulMask )
+{
+  __asm volatile (
+  " msr PRIMASK, r0	\n"
+  " bx lr				  "
+  ::: "memory"
+  );
+}
+
 #endif /* configASSERT_DEFINED */