Add mechlovin9 rev2 PCB (#12767)

* Add mechlovin9 rev2 PCB

Move mechlovin9 PCB from mechlovin/hannah65/mechlovin9 to mechlovin/mechlovin9
And add mechlovin9 rev.2

* update

* change bootloader and  bootmagic button

* Add mechlovin9 rev2 PCB

Move mechlovin9 PCB from mechlovin/hannah65/mechlovin9 to mechlovin/mechlovin9
And add mechlovin9 rev.2

keyboards/mechlovin/hannah65/rev1/haus/config.h

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+/*
+Copyright 2021 Mechlovin' Studio
+
+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/>.
+*/
+
+#pragma once
+
+#define PRODUCT_ID   0x6500
+#define DEVICE_VER   0x0001
+#define PRODUCTION   Haus Rev. 1

keyboards/mechlovin/hannah65/rev1/haus/readme.md

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+# Haus
+
+![Haus](https://i.imgur.com/sQ2QWAZh.jpg)
+
+A Haus PCB, Rev.1
+
+* Keyboard Maintainer: [Hand Engineering](https://www.reddit.com/r/MechanicalKeyboards/comments/hzcavx/haus_by_hand_engineering/)
+* Hardware Supported: Haus PCB rev.1, STM32F303.
+* Hardware Availability: Haus Keyboard.
+
+Make example for this keyboard (after setting up your build environment):
+
+    make mechlovin/hannah65/rev1/haus:default
+
+Flashing example for this keyboard:
+
+    make mechlovin/hannah65/rev1/haus:flash
+    
+
+
+**Reset Key:** To put the Haus PCB into bootloader, push reset swith on the bottom of the PCB.
+
+See the [build environment setup](https://docs.qmk.fm/#/getting_started_build_tools) and the [make instructions](https://docs.qmk.fm/#/getting_started_make_guide) for more information. Brand new to QMK? Start with our [Complete Newbs Guide](https://docs.qmk.fm/#/newbs).