smdk4412-common: camera: don't defer picture if CAF is in progress

CAF is considerably slower than Auto or Touch Focus and since we
are deferring the picture while CAF is in progress, there are
delays while taking the picture and these delays are sometimes
huge.

Disregard the CAF state since we could Touch to Focus if required.

Change-Id: If981f6402cc97e0781060dc48fa7d8e44288168f

Patchset: 1
http://review.cyanogenmod.org/#/c/56522/
(cherry picked from commit 3e888ef01334f49c9c93c0b3b3c9b38bf23716fe)