test_suite_pk: fix RSA issue in pk_psa_sign() when !PK_[PARSE|WRITE]_C are defined

This bug was not found until now because:
- !PK_[WRITE|PARSE]_C is only tested in component_full_no_pkparse_pkwrite()
- the test only case concerning RSA key had MBEDTLS_PK_WRITE_C as dependency
  so it was not executed in that component.

Signed-off-by: Valerio Setti <valerio.setti@nordicsemi.no>
diff --git a/tests/suites/test_suite_pk.data b/tests/suites/test_suite_pk.data
index 102aee2..a979cbd 100644
--- a/tests/suites/test_suite_pk.data
+++ b/tests/suites/test_suite_pk.data
@@ -684,7 +684,7 @@
 pk_psa_sign:PSA_KEY_TYPE_ECC_KEY_PAIR(PSA_ECC_FAMILY_BRAINPOOL_P_R1):512
 
 PSA wrapped sign: RSA PKCS1 v1.5
-depends_on:MBEDTLS_RSA_C:MBEDTLS_PKCS1_V15:MBEDTLS_GENPRIME:MBEDTLS_PK_WRITE_C
+depends_on:MBEDTLS_RSA_C:MBEDTLS_PKCS1_V15:MBEDTLS_GENPRIME
 pk_psa_sign:PSA_KEY_TYPE_RSA_KEY_PAIR:1024
 
 PK sign ext: RSA2048, PK_RSA, MD_SHA256