Use IS_ENABLED(CONFIG_XXX) instead of #ifdef/#endif statements to
initialize .enabled, minor simplicity improvement.
Signed-off-by: Xiu Jianfeng <xiujianfeng@huawei.com>
Reviewed-by: Ahmad Fatoum <a.fatoum@pengutronix.de>
Signed-off-by: Mimi Zohar <zohar@linux.ibm.com>