temp hack: add TEMP_BOOT_HACK flag to disable v4l2 for now

Will revert later
Change-Id: I372d139ac46af0f803b6e03099434991572dbfc4
drivers/mmc/host/msm_sdcc_raw.c: Call clk_prepare before enable

Change-Id: Ic5c907fc0d9db49d48ed2ca75c5bde6ab10290a6
fix: sdc1_p_clk: Don't call enable on unprepared clocks