coding guidelines: comply with MISRA Rule 11.8

- modified parameter types to receive a const pointer when a
  non-const pointer is not needed

- avoided redundant casts

Signed-off-by: Hess Nathan <nhess@baumer.com>
diff --git a/kernel/userspace_handler.c b/kernel/userspace_handler.c
index a26c508..da4053b 100644
--- a/kernel/userspace_handler.c
+++ b/kernel/userspace_handler.c
@@ -70,9 +70,8 @@
 {
 	struct k_object *ko;
 
-	ko = validate_any_object((void *)object);
-	K_OOPS(K_SYSCALL_VERIFY_MSG(ko != NULL, "object %p access denied",
-				    (void *)object));
+	ko = validate_any_object(object);
+	K_OOPS(K_SYSCALL_VERIFY_MSG(ko != NULL, "object %p access denied", object));
 	k_thread_perms_clear(ko, _current);
 }
 #include <syscalls/k_object_release_mrsh.c>