cpufreq: qcom-hw: Notify the current frequency to the topology driver

The topology driver keeps track of the current capacity of a CPU and
make it available via arch_scale_freq_capacity(). The PELT load
tracking in the scheduler and energy-aware task placement are the
clients of this API. Hence notify the new frequency to the topology
driver during frequency transition.

Change-Id: Ia0890956f59082496e7d5d7ba8a9c09b343e44ec
Signed-off-by: Pavankumar Kondeti <pkondeti@codeaurora.org>
[satyap@codeaurora.org: resolve trivial merge conflict]
Signed-off-by: Satya Durga Srinivasu Prabhala <satyap@codeaurora.org>