[ v4] powerpc: Force page alignment for initrd reserved memory

[Dave Carroll]

I'm withdrawing this patch for the moment, due to two areas that need further research;

1) An adjacent FDT blob, as mentioned by Milton Miller, and

2) Potential interaction with the crash kernel, as used in
        init/initramfs.c

If anyone sees other interactions, please feel free to let me know ...

Thanks,
-Dave Carroll