arm64: Enable frequency invariant scheduler load-tracking support
Defines arch_scale_freq_capacity() to use cpufreq implementation.
Including <linux/cpufreq.h> in topology.h like for the arm arch doesn't
work because of CONFIG_COMPAT=y (Kernel support for 32-bit EL0).
That's why cpufreq_scale_freq_capacity() has to be declared extern in
topology.h.
Change-Id: I492c1851063220336b4ef6834303f2d44a6daf7a
Signed-off-by:
Dietmar Eggemann <dietmar.eggemann@arm.com>
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