sony-laptop: return negative on failure in sony_nc_add()

There were two places in sony_nc_add() where we returned zero on failure
instead of a negative error code.
Signed-off-by: Dan Carpenter <error27@gmail.com>
Signed-off-by: Matthew Garrett <mjg@redhat.com>

drivers/platform/x86/sony-laptop.c

@@ -1594,9 +1594,11 @@ static int sony_nc_add(struct acpi_device *device)
 	if (ACPI_SUCCESS(acpi_get_handle(sony_nc_acpi_handle, "SN00",
 					 &handle))) {
 		dprintk("Doing SNC setup\n");
-		if (sony_nc_handles_setup(sony_pf_device))
+		result = sony_nc_handles_setup(sony_pf_device);
+		if (result)
 			goto outpresent;
-		if (sony_nc_kbd_backlight_setup(sony_pf_device))
+		result = sony_nc_kbd_backlight_setup(sony_pf_device);
+		if (result)
 			goto outsnc;
 		sony_nc_function_setup(device);
 		sony_nc_rfkill_setup(device);