mfd: sec: Don't compare against NULL / 0 for errors, use !

Follow general style and use if (!arg) instead of comparing against
NULL.

While at it, drop a useless init in sec-irq.c.

Signed-off-by: André Draszik <andre.draszik@linaro.org>
Link: https://lore.kernel.org/r/20250409-s2mpg10-v4-19-d66d5f39b6bf@linaro.org
Signed-off-by: Lee Jones <lee@kernel.org>

Author: andred

drivers/mfd/sec-common.c

@@ -164,7 +164,7 @@ int sec_pmic_probe(struct device *dev, int device_type, unsigned int irq,
 	int ret, num_sec_devs;
 
 	sec_pmic = devm_kzalloc(dev, sizeof(struct sec_pmic_dev), GFP_KERNEL);
-	if (sec_pmic == NULL)
+	if (!sec_pmic)
 		return -ENOMEM;
 
 	dev_set_drvdata(dev, sec_pmic);

drivers/mfd/sec-irq.c

@@ -448,8 +448,8 @@ static const struct regmap_irq_chip s5m8767_irq_chip = {
 
 int sec_irq_init(struct sec_pmic_dev *sec_pmic)
 {
-	int ret = 0;
 	const struct regmap_irq_chip *sec_irq_chip;
+	int ret;
 
 	switch (sec_pmic->device_type) {
 	case S5M8767X:
@@ -496,7 +496,7 @@ int sec_irq_init(struct sec_pmic_dev *sec_pmic)
 	ret = devm_regmap_add_irq_chip(sec_pmic->dev, sec_pmic->regmap_pmic,
 				       sec_pmic->irq, IRQF_ONESHOT,
 				       0, sec_irq_chip, &sec_pmic->irq_data);
-	if (ret != 0)
+	if (ret)
 		return dev_err_probe(sec_pmic->dev, ret,
 				     "Failed to add %s IRQ chip\n",
 				     sec_irq_chip->name);