spec: Split out a fwupd-plugin-flashrom subpackage
spec: Split out a fwupd-plugin-flashrom subpackage

This is installed by default, but means it can be excluded from the minimal
CoreOS image. It's highly unlikely that anything running CoreOS has anything
unlocked that can be flashed using flashrom.

This drops inclusion of dmidecode, libftdi, pciutils-libs and flashrom as hard
dependencies from the package set.

fwupd/fwupd,fwupd/fwupd,hughsie/fwupd,fwupd/fwupd,hughsie/fwupd,fwupd/fwupd,hughsie/fwupd,hughsie/fwupd