dmaengine: mv_xor_v2: Fix an error code.

If the probe is deferred, -EPROBE_DEFER should be returned, not
+EPROBE_DEFER.

Fixes: 3cd2c313 ("dmaengine: mv_xor_v2: Fix clock resource by adding a register clock")
Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Link: https://lore.kernel.org/r/201170dff832a3c496d125772e10070cd834ebf2.1679814350.git.christophe.jaillet@wanadoo.frSigned-off-by: Vinod Koul <vkoul@kernel.org>

drivers/dma/mv_xor_v2.c

@@ -752,7 +752,7 @@ static int mv_xor_v2_probe(struct platform_device *pdev)
 
 	xor_dev->clk = devm_clk_get(&pdev->dev, NULL);
 	if (PTR_ERR(xor_dev->clk) == -EPROBE_DEFER) {
-		ret = EPROBE_DEFER;
+		ret = -EPROBE_DEFER;
 		goto disable_reg_clk;
 	}
 	if (!IS_ERR(xor_dev->clk)) {