smdk4412-common: overlay: cleanup Gallery2 config

Samsung ZSL Command is intended to enable ZSL Mode on Samsung
Camera HAL. Since we are using an opensource HAL and enabling
ZSL natively, we no longer need this.

ProfileVideoSize is no longer available.

Change-Id: I96c8b3e6953d8c2e089d5cafaa9abffe86d9972f