msm: camera: sensor: Fix camera cci hw delay issue

Camera cci can't get the correct delay value, and
cci cycles_per_us is 0 which will configure wrong
value to register.
Assign the delay value to the correct element, and
don't reset src_clk_idx to 0 when receive CCI_RELEASE
cmd, it is got from dtsi and won't be assigned to
right value if reset it.

Change-Id: Ib3723f950131d215f974005cdd8dea721c47eae4
Signed-off-by: Depeng Shao <depengs@codeaurora.org>