Set GPU LIGHT clk divider ratios to /2.
Bug: 327700285
Test: Confirm no prints like:
"28000000.mali: Ctx 8349_23 Group 0 CSG 3 CSI: 3"
while running GFXBench under LIGHT MITIGATION
Signed-off-by: George Lee <geolee@google.com>
(cherry picked from https://googleplex-android-review.googlesource.com/q/commit:43d42739b57713f7e41df147e6372d1ccce6243f)
Merged-In: I4b62b33c0b72e5a053f477943379727d58f7298e
Change-Id: I4b62b33c0b72e5a053f477943379727d58f7298e