arm: msm: 9900: Remove MSM_DEVFREQ_CPUBW

Remove MSM_DEVFREQ_CPUBW for the FSM9900 target.
Currently this feature is not supported on fsm9900.

Change-Id: I2f9c1d5aab0523803a0019f5a51f1113fa00bbd9
Acked-by: Jie Luo <jluo@qti.qualcomm.com>
Signed-off-by: Niranjana Vishwanathapura <nvishwan@codeaurora.org>