[patch] grub-install for PPC

[Hollis Blanchard]

This patch creates a grub-install for PPC. Right now it requires 
ofpathname (see earlier mail) to be installed in /usr/sbin. It also 
requires /sbin/nvsetenv to be present for full functionality.

Here's the basic scenario: /boot/grub is a mounted firmware-readable 
filesystem, such as HFS or FAT (I have just reused my yaboot 
partition). It contains grub.cfg, grub itself, and modules. Firmware is 
directed to boot the grub ELF file by setting the boot-device firmware 
variable. (Note that you don't tell grub-install what device to install 
onto; that is discovered from /proc/mounts.)

This patch has been tested (along with make install). It has not been 
extensively tested or proofread or examined for error-checking.

Please try running grub-install after applying this patch. Note that it 
will make your system boot GRUB, so you may want to remember how to get 
back to yaboot for now...

-Hollis

P.S. Don't think I've forgotten about renaming "grubof"...

grub-install.diff
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