[coreboot] patch: remove embeddedplanet

[Myles Watson]

>> Signed-off-by: Ronald G. Minnich <rminnich at gmail.com>
>
> Acked-by: Uwe Hermann <uwe at hermann-uwe.de>
>
> Please remove targets/embeddedplanet also, thanks!
Done.  Rev 4710.

Thanks,
Myles