spi: atmel: Put allocated master before return

The allocated master is not released. Goto error handling label rather
than directly return.

Fixes: 5e9af37e ("spi: atmel: introduce probe deferring")
Signed-off-by: Pan Bian <bianpan2016@163.com>
Fixes: 5e9af37e ("spi: atmel: introduce probe deferring")
Reviewed-by: Tudor Ambarus <tudor.ambarus@microchip.com>
Link: https://lore.kernel.org/r/20210120050025.25426-1-bianpan2016@163.comSigned-off-by: Mark Brown <broonie@kernel.org>

drivers/spi/spi-atmel.c

@@ -1590,7 +1590,7 @@ static int atmel_spi_probe(struct platform_device *pdev)
 		if (ret == 0) {
 			as->use_dma = true;
 		} else if (ret == -EPROBE_DEFER) {
-			return ret;
+			goto out_unmap_regs;
 		}
 	} else if (as->caps.has_pdc_support) {
 		as->use_pdc = true;