add keyboard: bemeier/bmek (revisited) (#10144)

* bmek keyboard support

* Update keyboards/bemeier/bmek/bmek.h

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

* Update keyboards/bemeier/bmek/rules.mk

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

* moved shutdown behavior to shutdown hook

* removed dynamic macro option statement

* Apply suggestions from code review

Co-authored-by: James Young <18669334+noroadsleft@users.noreply.github.com>

* Apply suggestions from code review

Co-authored-by: James Young <18669334+noroadsleft@users.noreply.github.com>

* change layout name in via

* move/copy root rules to revs

* Apply suggestions from code review

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

* Apply suggestions from code review

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

Co-authored-by: Drashna Jaelre <drashna@live.com>
Co-authored-by: James Young <18669334+noroadsleft@users.noreply.github.com>

keyboards/bemeier/bmek/bmek.c

@@ -0,0 +1,23 @@
+/* Copyright 2020 bemeier
+ *
+ * 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 "bmek.h"
+
+__attribute__((weak))
+void shutdown_user() {
+#ifdef RGBLIGHT_ENABLE
+    rgblight_setrgb(255, 0, 0);
+#endif
+}