Separate directory discernment into 2 functions

Have separate in_mbedtls_repo() and in_psa_crypto_repo() functions

Signed-off-by: David Horstmann <david.horstmann@arm.com>
diff --git a/tests/scripts/all.sh b/tests/scripts/all.sh
index 33bad39..36a20b3 100755
--- a/tests/scripts/all.sh
+++ b/tests/scripts/all.sh
@@ -124,7 +124,11 @@
 shopt -s extglob
 
 in_mbedtls_repo () {
-    test ! -d core
+    test -d include -a -d library -a -d programs -a -d tests
+}
+
+in_psa_crypto_repo () {
+    test -d include -a -d core -a -d drivers -a -d programs -a -d tests
 }
 
 pre_check_environment () {