I changed /etc/yaboot.conf to reflect that root=/dev/sdb6. Now it boots nicely into wheezy. I have pata_macio in /etc/modules now....Excuse me, pata_macio is NOT in /etc/modules but it is loaded at boot (it shows up wit lsmod). During installation I chrooted into /target and added pata_macio to /etc/modules and then I updated initramfs. So the kernel module gets loaded at boot time.