msm: Restore MSM_DEVFREQ_CPUBW in fsm9900

Add MSM_DEVFREQ_CPUBW feature for the FSM9900 platform. This feature is now
supported on all the FSM9900 targets.

Change-Id: I28bf32d7686fced923b451beae3b899214627e84
Acked-by: Kaushik Sikdar <ksikdar@qti.qualcomm.com>
Signed-off-by: Rohit Vaswani <rvaswani@codeaurora.org>