replace use_psa_crypto with psa_crypto_c

Signed-off-by: Jerry Yu <jerry.h.yu@arm.com>
diff --git a/library/pk.c b/library/pk.c
index 091cb6b..4c3c774 100644
--- a/library/pk.c
+++ b/library/pk.c
@@ -36,7 +36,7 @@
 #include "mbedtls/ecdsa.h"
 #endif
 
-#if defined(MBEDTLS_USE_PSA_CRYPTO)
+#if defined(MBEDTLS_PSA_CRYPTO_C)
 #include "mbedtls/psa_util.h"
 #endif
 
@@ -545,7 +545,7 @@
                                  sig, sig_size, sig_len, f_rng, p_rng ) );
     }
 
-#if defined(MBEDTLS_X509_RSASSA_PSS_SUPPORT) && defined(MBEDTLS_USE_PSA_CRYPTO)
+#if defined(MBEDTLS_X509_RSASSA_PSS_SUPPORT)
     return( mbedtls_pk_psa_sign_ext( PSA_ALG_RSA_PSS(
                                         mbedtls_psa_translate_md( md_alg ) ),
                                      ctx->pk_ctx, hash, hash_len,