c923125e2a
There's a number of EFI_ZFS_BOOT #ifdefs that aren't needed, or can be eliminated with some trivial #defines. Remove the EFI_ZFS_BOOT ifdefs that aren't needed. Replace libzfs.h include which is not safe to include without EFI_ZFS_BOOT with efizfs.h which is and now conditionally included libzfs.h. Define efizfs_set_preferred away and define efi_zfs_probe to NULL when ZFS is compiled out.