[nrf toup] Fix RSA dependency on PK write when enabling PSA crypto

Fix RSA (MBEDTLS_RSA_C) dependency on PK write (MBEDTLS_PK_WRITE_C)
when enabling PSA Crypto (MBEDTLS_PSA_CRYPTO_C).
This should instead depend on MBedTLS using PSA crypto
(MBEDTLS_USE_PSA_CRYPTO).

Raised as issue to MbedTLS project:
Mbed-TLS/mbedtls#7126

Signed-off-by: Joakim Andersson <joakim.andersson@nordicsemi.no>
(cherry picked from commit 65311cf)
(cherry picked from commit 702f824)

library/pk_wrap.c

@@ -256,7 +256,7 @@ static int rsa_verify_wrap( void *ctx, mbedtls_md_type_t md_alg,
 }
 #endif
 
-#if defined(MBEDTLS_PSA_CRYPTO_C)
+#if defined(MBEDTLS_USE_PSA_CRYPTO)
 int  mbedtls_pk_psa_rsa_sign_ext( psa_algorithm_t alg,
                                   mbedtls_rsa_context *rsa_ctx,
                                   const unsigned char *hash, size_t hash_len,