ARM: dts: msm: Update camera clock sources for sdm660

Changing the clock source frequencies to lower
working frequencies so that the camera runs in
SVS_L1 mode, which reduces the power consumption.

Change-Id: I92344fcd0f4492badd6a50c011b0aa8b4231a373
Signed-off-by: Samyukta Mogily <smogily@codeaurora.org>