psa: Rename pss_key_owner_id_t to mbedtls_key_owner_id_t

Rename psa_key_owner_id_t to mbedtls_key_owner_id_t to
highlight that this is a Mbed TLS specific type and not
a type defined in the PSA Cryptography API specification.

Signed-off-by: Ronald Cron <ronald.cron@arm.com>
diff --git a/include/psa/crypto_platform.h b/include/psa/crypto_platform.h
index 0bebb08..5e6180e 100644
--- a/include/psa/crypto_platform.h
+++ b/include/psa/crypto_platform.h
@@ -52,7 +52,7 @@
 #if defined(PSA_CRYPTO_SECURE)
 /* Building for the PSA Crypto service on a PSA platform. */
 /* A key owner is a PSA partition identifier. */
-typedef int32_t psa_key_owner_id_t;
+typedef int32_t mbedtls_key_owner_id_t;
 #endif
 
 #endif /* MBEDTLS_PSA_CRYPTO_KEY_FILE_ID_ENCODES_OWNER */