i2c: acpi: Drop double check for ACPI companion device

acpi_dev_get_resources() does perform the NULL pointer check against
ACPI companion device which is given as function parameter. Thus,
there is no need to duplicate this check in the caller.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Wolfram Sang <wsa@kernel.org>

drivers/i2c/i2c-core-acpi.c

@@ -468,16 +468,12 @@ struct notifier_block i2c_acpi_notifier = {
 struct i2c_client *i2c_acpi_new_device(struct device *dev, int index,
 				       struct i2c_board_info *info)
 {
+	struct acpi_device *adev = ACPI_COMPANION(dev);
 	struct i2c_acpi_lookup lookup;
 	struct i2c_adapter *adapter;
-	struct acpi_device *adev;
 	LIST_HEAD(resource_list);
 	int ret;
 
-	adev = ACPI_COMPANION(dev);
-	if (!adev)
-		return ERR_PTR(-EINVAL);
-
 	memset(&lookup, 0, sizeof(lookup));
 	lookup.info = info;
 	lookup.device_handle = acpi_device_handle(adev);