pk: replace CRYPTO_CLIENT guards with CRYPTO_C

Signed-off-by: Valerio Setti <valerio.setti@nordicsemi.no>
diff --git a/library/pk.c b/library/pk.c
index ffe350e..2c0ef68 100644
--- a/library/pk.c
+++ b/library/pk.c
@@ -27,7 +27,7 @@
 #include "mbedtls/ecdsa.h"
 #endif
 
-#if defined(MBEDTLS_PSA_CRYPTO_CLIENT)
+#if defined(MBEDTLS_PSA_CRYPTO_C)
 #include "psa_util_internal.h"
 #include "mbedtls/psa_util.h"
 #endif
@@ -1378,7 +1378,7 @@
     return ctx->pk_info->type;
 }
 
-#if defined(MBEDTLS_PSA_CRYPTO_CLIENT)
+#if defined(MBEDTLS_PSA_CRYPTO_C)
 int mbedtls_pk_copy_from_psa(mbedtls_svc_key_id_t key_id, mbedtls_pk_context *pk)
 {
     psa_status_t status;
@@ -1502,6 +1502,6 @@
 
     return ret;
 }
-#endif /* MBEDTLS_PSA_CRYPTO_CLIENT */
+#endif /* MBEDTLS_PSA_CRYPTO_C */
 
 #endif /* MBEDTLS_PK_C */