msm: camera: jpeg10: Get clock names and rates from dtsi files

Made changes in jpeg driver to get clock names
and clock rates from corresponding camera dtsi files.
Earlier we had these values assigned in a structure
array. Cleaner way is to fetch values from dtsi files.

Change-Id: If8632d01e02f6d6d419223facb59e1636d748f11
Signed-off-by: Krupal Divvela <kdivvela@codeaurora.org>