powerpc/85xx: Implement 64-bit kexec support
powerpc/85xx: Implement 64-bit kexec support

Unlike 32-bit 85xx kexec, we don't do a core reset.

Signed-off-by: Tiejun Chen <86aa98d1ce79e67acc7976f5603381a6ff7f6a6e@windriver.com>
[scottwood: edit changelog, and cleanup]
Signed-off-by: Scott Wood <b77916c2feab81a70245e7b5671f4f02730ebf64@freescale.com>

KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs