unifying: use fu_firmware_strparse_uint16 to read be 16bit values
unifying: use fu_firmware_strparse_uint16 to read be 16bit values

Signed-off-by: Filipe Laíns <d780ea131edc6126ff48fa0382b66c02d54b57a5@archlinux.org>

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