clk: msm: clock: Gate the limits clock during certain sleep states

Program the DROOP_CODE register for both clusters so that
the limits management clock is gated off during certain
sleep states.

CRs-Fixed: 973567
Change-Id: If4860d329393ece54a4d0f017c2700d4bde9d2b6
Signed-off-by: Deepak Katragadda <dkatraga@codeaurora.org>