smdk4412-common: Don't build torch for devices without flash

For devices without a flash set TARGET_NO_CAM_FLASH := true

Conficts:
Changed from ifneq ($(TARGET_HAS_CAM_FLASH) ,false) to
ifneq ($(TARGET_NO_CAM_FLASH) ,true) to be more clear.

Change-Id: I63b9f9441d9c654d06704b72a786fc15a197d3cc