modules: uoscore-uedhoc: Make the library build with TFM

Following the same pattern as in the other libraries/samples, add TFM
include directory explicitly when building uoscore library, to mitigate
the problem of redefined header files in TFM. When TFM is enabled,
headers from TFM should be used, not mbed TLS ones.

Signed-off-by: Robert Lubos <robert.lubos@nordicsemi.no>
1 file changed