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The behavior of the MMP platform code depends on whether the CPU_PXA168/CPU_PXA910/CPU_MMP2 symbols are enabled or not. I believe the intention here was that these can be left disabled for a pure DT-only build, but it's not clear if that actually works. At the minimum, the cpu_is_pxa168() and cpu_is_pxa910() checks behave differently, which causes changes in the power management code. For the moment, make the behavior depend on whether CONFIG_ATAGS is set or not, to make it easier to bisect the removal of the old code later. Signed-off-by: Arnd Bergmann <arnd@arndb.de>