[PATCH] arm-cci500: Workaround pmu_event_set_period

[Russell King - ARM Linux]

As you're posting an update to CCI500, I thought I'd hijack this
thread to complain about the same thing that I complained about
with CCI400:

+config ARM_CCI500_PMU
+       bool "ARM CCI500 PMU support"
+       default y
+       depends on (ARM && CPU_V7) || ARM64
+       depends on PERF_EVENTS
+       select ARM_CCI_PMU

Why "default y" ?  Not all ARMv7 CPUs have the CCI bus, and what it
means is that when moving forward, it's a pain to remember to turn
the option off amongst all the other Kconfig questions.

Only make things "default y" if it was something that was built in
a previous kernel and not building it in a later kernel would cause
a regression, or where it's absolutely necessary to do so.

Thanks.

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