iio:proximity:sx9324: Check ret value of device_property_read_u32_array()

0-day reports:

drivers/iio/proximity/sx9324.c:868:3: warning: Value stored
to 'ret' is never read [clang-analyzer-deadcode.DeadStores]

Put an if condition to break out of switch if ret is non-zero.

Signed-off-by: Aashish Sharma <shraash@google.com>
Fixes: a8ee3b32f5 ("iio:proximity:sx9324: Add dt_binding support")
Reported-by: kernel test robot <lkp@intel.com>
[swboyd@chromium.org: Reword commit subject, add fixes tag]
Signed-off-by: Stephen Boyd <swboyd@chromium.org>
Reviewed-by: Gwendal Grignou <gwendal@chromium.org>
Link: https://lore.kernel.org/r/20220613232224.2466278-1-swboyd@chromium.org
Cc: <Stable@vger.kernel.org>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

drivers/iio/proximity/sx9324.c

@@ -885,6 +885,9 @@ sx9324_get_default_reg(struct device *dev, int idx,
 			break;
 		ret = device_property_read_u32_array(dev, prop, pin_defs,
 						     ARRAY_SIZE(pin_defs));
+		if (ret)
+			break;
+
 		for (pin = 0; pin < SX9324_NUM_PINS; pin++)
 			raw |= (pin_defs[pin] << (2 * pin)) &
 			       SX9324_REG_AFE_PH0_PIN_MASK(pin);