[Keyboard] Add support for Southpaw Extended 65% (#8465)

* Add support for Southpaw Extended 65%

* Update keyboards/switchplate/southpaw_65/readme.md

* Update keyboards/switchplate/southpaw_65/readme.md

* Update keyboards/switchplate/southpaw_65/readme.md

* Update keyboards/switchplate/southpaw_65/southpaw_65.c

* Update keyboards/switchplate/southpaw_65/rules.mk

* Cleaned up keymaps
-Removed default2 keymap
-Removed default_iso2 keymap
-Rename default keymap directory to default_ansi to reflect correct keymap name

* Update readme.md for default_ansi keymap directory change

* Add layout_all for configurator and correct maximum number of keys supported in readme.md

* Update keyboards/switchplate/southpaw_65/info.json

Forgot to change name to LAYOUT_all

* Update keyboards/switchplate/southpaw_65/info.json

* Update keyboards/switchplate/southpaw_65/readme.md

* Update keyboards/switchplate/southpaw_65/rules.mk

* Add LAYOUT_all keymap

* Update keyboards/switchplate/southpaw_65/keymaps/default/keymap.c

* Update keyboards/switchplate/southpaw_65/info.json

keyboards/switchplate/southpaw_65/southpaw_65.c

@@ -0,0 +1,30 @@
+/* Copyright 2019
+ *
+ * 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 "southpaw_65.h"
+
+void keyboard_pre_init_kb(void) {
+  setPinOutput(B6);
+
+  keyboard_pre_init_user();
+}
+
+bool led_update_kb(led_t led_state) {
+    bool res = led_update_user(led_state);
+    if(res) {
+        writePin(B6, !led_state.caps_lock);
+    }
+    return res;
+}