ata: sata_rcar: drop useless initializer

There is no need to initialize the variable ret.
Signed-off-by: Yangtao Li <frank.li@vivo.com>
Reviewed-by: Sergey Shtylyov <s.shtylyov@omp.ru>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Damien Le Moal <dlemoal@kernel.org>

drivers/ata/sata_rcar.c

@@ -862,8 +862,7 @@ static int sata_rcar_probe(struct platform_device *pdev)
 	struct ata_host *host;
 	struct sata_rcar_priv *priv;
 	struct resource *mem;
-	int irq;
-	int ret = 0;
+	int irq, ret;
 
 	irq = platform_get_irq(pdev, 0);
 	if (irq < 0)