modules: tfm: Remove duplicate tfm cmakecache config

Remove duplicated setting of TF-M CMakeCache.txt entry TFM_BOARD.
In addition it is also wrong since the CONFIG_ prefix is missing.

Leftover from: 583d5a6db347db0ad40017c109eee6260d6a5300

Signed-off-by: Joakim Andersson <joakim.andersson@nordicsemi.no>
1 file changed