PM / devfreq: bw_hwmon: Reset clear bits for some hardware versions

Certain versions of the hardware modules have monitor/interrupt clear
registers that are not self-clearing after being written to.
Explicitly clear those register bits after writing to them.

Change-Id: I0e6252be11d8503bcd4719480f503650e46a23ae
Signed-off-by: Rohit Gupta <rohgup@codeaurora.org>
Signed-off-by: Rama Aparna Mallavarapu <aparnam@codeaurora.org>