* util/hostdisk.c [__FreeBSD_kernel__]: Include sys/disk.h.
(grub_util_biosdisk_open) [__FreeBSD_kernel__]: Add support for
GNU/kFreeBSD. Check if a device is a character device. Use
DIOCGMEDIASIZE to get the size.
(convert_system_partition_to_system_disk) [__FreeBSD_kernel__]: Add
support for GNU/kFreeBSD.
(grub_util_biosdisk_get_grub_dev) [__FreeBSD_kernel__]: Check if OS_DEV
is a character device instead of a block device. Add support for
FreeBSD device names.
* util/getroot.c (find_root_device) [__FreeBSD_kernel__]: Check if ENT
is a character device instead of a block device.
* util/grub-probe.c (probe) [__FreeBSD_kernel__]: Check if DEVICE_NAME
is a character device instead of a block device.