kernel: Fix 10.4 violations

Both operands of an operator in which the usual arithmetic
conversions are performed shall have the same essential
type category.

Signed-off-by: Flavio Ceolin <flavio.ceolin@intel.com>

kernel/futex.c

@@ -27,7 +27,7 @@ static struct z_futex_data *k_futex_find_data(struct k_futex *futex)
 int z_impl_k_futex_wake(struct k_futex *futex, bool wake_all)
 {
 	k_spinlock_key_t key;
-	unsigned int woken = 0;
+	unsigned int woken = 0U;
 	struct k_thread *thread;
 	struct z_futex_data *futex_data;
 

kernel/thread.c

@@ -540,7 +540,7 @@ char *z_setup_new_thread(struct k_thread *new_thread,
 	Z_ASSERT_VALID_PRIO(prio, entry);
 
 #ifdef CONFIG_USERSPACE
-	__ASSERT((options & K_USER) == 0 || z_stack_is_user_capable(stack),
+	__ASSERT((options & K_USER) == 0U || z_stack_is_user_capable(stack),
 		 "user thread %p with kernel-only stack %p",
 		 new_thread, stack);
 	z_object_init(new_thread);