Apple may be limiting fast charging for the 2018 iPhone lineup for specifically certified chargers, according to a new report from Japanese site Mac Otakara (via 9to5Mac). Although fast charging came to the 2017 iPhone lineup last year — and the iPad Pro before that — via the USB Power Distribution (USB-PD) standard, the new report suggests that Apple may be taking steps to ensure that only certified chargers will work by requiring that they support…