i2c: riic: Introduce a separate variable for IRQ

Refactor the IRQ handling in riic_i2c_probe by introducing a local variable
`irq` to store IRQ numbers instead of assigning them to `ret`. This change
improves code readability and clarity.

Suggested-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Reviewed-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Tested-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>

Author: prabhakarlad

drivers/i2c/busses/i2c-riic.c

@@ -464,11 +464,13 @@ static int riic_i2c_probe(struct platform_device *pdev)
 		return ret;
 
 	for (i = 0; i < ARRAY_SIZE(riic_irqs); i++) {
-		ret = platform_get_irq(pdev, riic_irqs[i].res_num);
-		if (ret < 0)
-			return ret;
+		int irq;
+
+		irq = platform_get_irq(pdev, riic_irqs[i].res_num);
+		if (irq < 0)
+			return irq;
 
-		ret = devm_request_irq(dev, ret, riic_irqs[i].isr,
+		ret = devm_request_irq(dev, irq, riic_irqs[i].isr,
 				       0, riic_irqs[i].name, riic);
 		if (ret) {
 			dev_err(dev, "failed to request irq %s\n", riic_irqs[i].name);