add custom defconfig

Change-Id: Id7e14a5ffc7df714d6ee1890a20d2bcb9e1f0498
change flip masks and bits for smartcover

*) use SW_LID instead of SW_FLIP
*) invert state of the flipcover

Change-Id: I620b198adbd696d0b69ae7df3b4c6fcb0c7b1b64