platform: nordic_nrf: Move ITS defines to common CMake

The TFM_ITS_ENCRYPTED define (and friends) are the same for all nrf
platforms so put the CMake code in the common CMakeLists.txt file.

This improves portability.

Change-Id: Ifedb4eb6119aa9a50dd5444a07fb0d4ee3ab4303
Signed-off-by: Markus Swarowsky <markus.swarowsky@nordicsemi.no>
3 files changed