From Fedora Project Wiki
ARM booting simplified
Fedora 21 ARM images will boot more predictably thanks to the addition of syslinux support to *u-boot*.
u-boot's use of syslinux allows pxelinux for network booting and extlinux for local booting. This allows ARM systems to boot similarly to x86 hardware, including the Fedora installation program *anaconda*, or to boot generalized images.