[U-Boot] Coldfire toolchains

Dear all,

for who could be interested, here you can find two working toolchains, for i686 and x86_64 hosts.

http://www.denx.de/wiki/U-Boot/ColdFireNotes

In my case, compiling for mcf5307, none of the official kernel.org toolchains was producing correct code, so i did some adjustments over them.

I also set up here locally the kernel.org "buildall" script, so in case i can produce some additional versions.

Best regards, Angelo Dureghello