msm: camera: Clear Framebased enable bit

For non-framebased writemasters, the framebased
enable bit should not be set. This change will
ensure the register is cleared. Without this change
if the hardware is not reset during mode transition,
the bit will be set for non-framebased writemasters.

Change-Id: Id6d65fbf4aecb9fdafdf251595a9b785d1cee93d
Signed-off-by: Kevin Chan <ktchan@codeaurora.org>