virtual-fstab: /boot is now ext4 by default
virtual-fstab: /boot is now ext4 by default

Update /etc/fstab for /boot using ext4 instead of previously preferred ext2
since uboot can now read ext4 as well.

Signed-off-by: Jens Rehsack <69d49c504a9219a55b8be0f905e8fe3c32ffb57f@netbsd.org>

rehsack/meta-jens,rehsack/meta-jens,rehsack/meta-jens