xtest: fix (another) type issue in sdp_basic.c

Signed-off-by: Etienne Carriere <etienne.carriere@st.com>
Reviewed-by: Jens Wiklander <jens.wiklander@linaro.org>
diff --git a/host/xtest/sdp_basic.c b/host/xtest/sdp_basic.c
index 6c58aaf..f7bd5a6 100644
--- a/host/xtest/sdp_basic.c
+++ b/host/xtest/sdp_basic.c
@@ -138,7 +138,7 @@
 static int create_tee_ctx(struct tee_ctx *ctx, enum test_target_ta target_ta)
 {
 	TEEC_Result teerc;
-	TEEC_UUID *uuid;
+	const TEEC_UUID *uuid;
 	uint32_t err_origin;
 
 	switch (target_ta) {