userspace: (cosmetic) clean up sparse use

Fix wrong sparse type-casting.

Signed-off-by: Guennadi Liakhovetski <guennadi.liakhovetski@linux.intel.com>

Author: lyakh

zephyr/lib/userspace_helper.c

@@ -60,15 +60,14 @@ void module_driver_heap_remove(struct k_heap *mod_drv_heap)
 
 void *user_stack_allocate(size_t stack_size, uint32_t options)
 {
-	return (__sparse_force void __sparse_cache *)
-		k_thread_stack_alloc(stack_size, options & K_USER);
+	return k_thread_stack_alloc(stack_size, options & K_USER);
 }
 
 int user_stack_free(void *p_stack)
 {
 	if (!p_stack)
 		return 0;
-	return k_thread_stack_free((__sparse_force void *)p_stack);
+	return k_thread_stack_free(p_stack);
 }
 
 int user_memory_init_shared(k_tid_t thread_id, struct processing_module *mod)
@@ -89,15 +88,14 @@ void *user_stack_allocate(size_t stack_size, uint32_t options)
 {
 	/* allocate stack - must be aligned and cached so a separate alloc */
 	stack_size = K_KERNEL_STACK_LEN(stack_size);
-	void *p_stack = (__sparse_force void __sparse_cache *)
-		rballoc_align(SOF_MEM_FLAG_USER, stack_size, Z_KERNEL_STACK_OBJ_ALIGN);
+	void *p_stack = rballoc_align(SOF_MEM_FLAG_USER, stack_size, Z_KERNEL_STACK_OBJ_ALIGN);
 
 	return p_stack;
 }
 
 int user_stack_free(void *p_stack)
 {
-	rfree((__sparse_force void *)p_stack);
+	rfree(p_stack);
 	return 0;
 }