cpufreq: tegra186: Set target frequency for all cpus in policy

cpufreq: tegra186: Set target frequency for all cpus in policy

The original commit set all cores in a cluster to a shared policy, but
did not update set_target to apply a frequency change to all cores for
the policy. This caused most cores to remain stuck at their boot
frequency.

Fixes: be4ae8c19492 ("cpufreq: tegra186: Share policy per cluster")
Signed-off-by: Aaron Kling <webgeek1234@gmail.com>
Reviewed-by: Mikko Perttunen <mperttunen@nvidia.com>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>