powerpc/85xx: add HOTPLUG_CPU support
Add support to disable and re-enable individual cores at runtime on MPC85xx/QorIQ SMP machines. Currently support e500v1/e500v2 core. MPC85xx machines use ePAPR spin-table in boot page for CPU kick-off. This patch uses the boot page from bootloader to boot core at runtime. It supports 32-bit and 36-bit physical address. Signed-off-by: NLi Yang <leoli@freescale.com> Signed-off-by: NJin Qing <b24347@freescale.com> Signed-off-by: NZhao Chenhui <chenhui.zhao@freescale.com> Signed-off-by: NKumar Gala <galak@kernel.crashing.org>
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