Fix Caps Lock indication on Valhalla v2 (qmk#23012)

* Fix Caps Lock indication

* User LED state function override added

Co-authored-by: Drashna Jaelre <drashna@live.com>

* Change backlight enabled check and remove backlight headers

Co-authored-by: Drashna Jaelre <drashna@live.com>

---------

Co-authored-by: Drashna Jaelre <drashna@live.com>

keyboards/noxary/valhalla_v2/valhalla_v2.c

@@ -0,0 +1,25 @@
+/* Copyright 2023 Gondolindrim <gondolindrim@acheronproject.com>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "quantum.h"
+
+bool led_update_kb(led_t led_state) {
+    if (!led_update_user(led_state)) {
+        return false;
+    }
+    (led_state.caps_lock && is_backlight_enabled()) ? backlight_set(get_backlight_level()) : backlight_set(0);
+    return true;
+}