MSM8960v1 has mesh based lens rolloff while MSM8960v2 has
PCA based lens rolloff. Also starting from MSM8960v2 and
newer chipsets have double buffered lens rolloff. So adding
the run-time lens rolloff update, new config for PCA lens
rolloff and run-time selection of Mesh or PCA lens rolloff.
Signed-off-by: Ujwal Patel <ujwalp@codeaurora.org>