evita: Update README

Change-Id: Ifc55cb626e6d4a455c9377fde51300be09e8c1c8
Signed-off-by: Rohan Mathur <rohanmathur34@gmail.com>
Overlay: move camera zsl from common to device

Change-Id: I9ea1f38c0e5c13ef590ae5b9b0408525768661fd