HID: hid-steelseries fix led class build issue

Fixes 'undefined reference' issue when hid-steelseries is built in,
but led-class is a module.
--
drivers/built-in.o: In function `steelseries_srws1_remove':
hid-steelseries.c:(.text+0x3b97a1): undefined reference to `led_classdev_unregister'
drivers/built-in.o: In function `steelseries_srws1_probe':
hid-steelseries.c:(.text+0x3b9c51): undefined reference to `led_classdev_register'
hid-steelseries.c:(.text+0x3b9ce5): undefined reference to `led_classdev_register'
hid-steelseries.c:(.text+0x3b9d4b): undefined reference to `led_classdev_unregister'
--

Patch allows LED control when led-class is built in, or both hid-steelseries
_and_ led-class are both modules.
Reported-by: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Simon Wood <simon@mungewell.org>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>

drivers/hid/hid-steelseries.c

@@ -18,7 +18,8 @@
 
 #include "hid-ids.h"
 
-#if defined(CONFIG_LEDS_CLASS) || defined(CONFIG_LEDS_CLASS_MODULE)
+#if IS_BUILTIN(CONFIG_LEDS_CLASS) || \
+    (IS_MODULE(CONFIG_LEDS_CLASS) && IS_MODULE(CONFIG_HID_STEELSERIES))
 #define SRWS1_NUMBER_LEDS 15
 struct steelseries_srws1_data {
 	__u16 led_state;
@@ -107,7 +108,8 @@ static __u8 steelseries_srws1_rdesc_fixed[] = {
 0xC0                /*  End Collection                      */
 };
 
-#if defined(CONFIG_LEDS_CLASS) || defined(CONFIG_LEDS_CLASS_MODULE)
+#if IS_BUILTIN(CONFIG_LEDS_CLASS) || \
+    (IS_MODULE(CONFIG_LEDS_CLASS) && IS_MODULE(CONFIG_HID_STEELSERIES))
 static void steelseries_srws1_set_leds(struct hid_device *hdev, __u16 leds)
 {
 	struct list_head *report_list = &hdev->report_enum[HID_OUTPUT_REPORT].report_list;
@@ -370,7 +372,8 @@ MODULE_DEVICE_TABLE(hid, steelseries_srws1_devices);
 static struct hid_driver steelseries_srws1_driver = {
 	.name = "steelseries_srws1",
 	.id_table = steelseries_srws1_devices,
-#if defined(CONFIG_LEDS_CLASS) || defined(CONFIG_LEDS_CLASS_MODULE)
+#if IS_BUILTIN(CONFIG_LEDS_CLASS) || \
+    (IS_MODULE(CONFIG_LEDS_CLASS) && IS_MODULE(CONFIG_HID_STEELSERIES))
 	.probe = steelseries_srws1_probe,
 	.remove = steelseries_srws1_remove,
 #endif