msm: camera: utils: Remove deprecated clk_set_flag functions

Removed unused functions that called clk_set_flag, which has been
deprecated in linux kernel 5.x.

CRs-Fixed: 2554484
Change-Id: I0062383b0b059e6b359229f4b33470713289abb4
Signed-off-by: Karthik Jayakumar <kjayakum@codeaurora.org>