powerpc: Migrate CONFIG_PPC_SPINTABLE_COMPATIBLE to Kconfig

Move this symbol to Kconfig, and preserve the current behavior. The
help text here comes from where the relevant code is implemented and it
is quite likely at this point in time we could either disable this
option or at least make it configurable.

Signed-off-by: Tom Rini <trini@konsulko.com>
2 files changed