tpm/tpm_ftpm_tee: Use UUID API for exporting the UUID

There is export_uuid() function which exports uuid_t to the u8 array.
Use it instead of open coding variant.

This allows to hide the uuid_t internals.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Acked-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>

drivers/char/tpm/tpm_ftpm_tee.c

@@ -241,7 +241,7 @@ static int ftpm_tee_probe(struct platform_device *pdev)
 
 	/* Open a session with fTPM TA */
 	memset(&sess_arg, 0, sizeof(sess_arg));
-	memcpy(sess_arg.uuid, ftpm_ta_uuid.b, TEE_IOCTL_UUID_LEN);
+	export_uuid(sess_arg.uuid, &ftpm_ta_uuid);
 	sess_arg.clnt_login = TEE_IOCTL_LOGIN_PUBLIC;
 	sess_arg.num_params = 0;