i2c: mlxcpld: Add callback to notify probing completion

Add notification to inform caller that driver probing has been
completed. It allows to user, invoked platform device registration for
"i2c-mlxcpld" driver, to be notified that bus adapter is available, and
thus some devices could be connected to this bus.

Signed-off-by: Vadim Pasternak <vadimp@nvidia.com>
Signed-off-by: Wolfram Sang <wsa@kernel.org>

drivers/i2c/busses/i2c-mlxcpld.c

@@ -560,6 +560,10 @@ static int mlxcpld_i2c_probe(struct platform_device *pdev)
 	if (err)
 		goto mlxcpld_i2_probe_failed;
 
+	/* Notify caller when adapter is added. */
+	if (pdata && pdata->completion_notify)
+		pdata->completion_notify(pdata->handle, mlxcpld_i2c_adapter.nr);
+
 	return 0;
 
 mlxcpld_i2_probe_failed: