ARM: dts: msm: Update camera clock sources for sdm630

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: I47c105dafa96879c5607acae4680f3b189f4941a
Signed-off-by: Shankar Ravi <rshankar@codeaurora.org>