msm: camera: cpas: Update logic for reading hw version at runtime

This change will read the hw version and assign the cpas hw version
at runtime. This change help to remove DT entry for every hw iteration.

Change-Id: I3c3ad3b2bab1735b308e21e6e0ffb9780cdc3270
Signed-off-by: Jigarkumar Zala <jzala@codeaurora.org>