psa-client-server: move psasim from framework repo to the mbedtls one

This is a temporary fix that will be reverted once the framework
repository will have CI checks.

Signed-off-by: Valerio Setti <valerio.setti@nordicsemi.no>
diff --git a/tests/psa-client-server/psasim/Makefile b/tests/psa-client-server/psasim/Makefile
new file mode 100644
index 0000000..a84483c
--- /dev/null
+++ b/tests/psa-client-server/psasim/Makefile
@@ -0,0 +1,23 @@
+CFLAGS ?= -Wall -Werror -std=c99 -D_XOPEN_SOURCE=1 -D_POSIX_C_SOURCE=200809L
+
+ifeq ($(DEBUG),1)
+	CFLAGS += -DDEBUG -O0 -g
+endif
+
+.PHONY: all lib test run
+
+all: lib test
+
+lib:
+	$(MAKE) -C src CFLAGS="$(CFLAGS)"
+
+test: lib
+	$(MAKE) -C test CFLAGS="$(CFLAGS)"
+
+clean:
+	rm -f $(PSA_LIB) $(PSA_LIB_OBJS)
+	$(MAKE) -C test clean
+	$(MAKE) -C src clean
+
+run: test
+	cd test && ./run_test.sh