arm64: topology: Drop the useless update to per-cpu cycles

The previous call to update_freq_counters_refs() has already updated the
per-cpu variables, don't overwrite them with the same value again.

Fixes: 4b9cf23c ("arm64: wrap and generalise counter read functions")
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Reviewed-by: Ionela Voinescu <ionela.voinescu@arm.com>
Reviewed-by: Sudeep Holla <sudeep.holla@arm.com>
Link: https://lore.kernel.org/r/7a171f710cdc0f808a2bfbd7db839c0d265527e7.1607579234.git.viresh.kumar@linaro.org


Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>