arm/trusted-services: check before applying patches

At the apply ts patch stage, first check if they are patches
to be applied. Because if not, this would break the apply
patch stage with an error.

Signed-off-by: Rui Miguel Silva <rui.silva@linaro.org>
Signed-off-by: Jon Mason <jon.mason@arm.com>

meta-arm/recipes-security/trusted-services/ts-psa-api-test-common_git.inc

@@ -18,11 +18,9 @@ EXTRA_OECMAKE += "\
                   -DPSA_ARCH_TESTS_SOURCE_DIR=${WORKDIR}/git/psatest \
                  "
 
-# TS ships patches that need to be applied to psa-arch-tests
+# TS check if there are patches to apply to psa-arch-tests, if so apply them
 apply_ts_patch() {
-    for p in ${S}/external/psa_arch_tests/*.patch; do
-        patch -p1 -d ${WORKDIR}/git/psatest < ${p}
-    done
+    find ${S}/external/psa_arch_tests -type f -name '*.patch' -exec patch -p1 -d ${WORKDIR}/git/psatest -i {} \;
 }
 do_patch[postfuncs] += "apply_ts_patch"