Adding Plasma Cloud PA1200 to supported hardware and create list of hardware supported only in release candidate

Author: ilario

docs/hardware/index.txt

@@ -63,7 +63,13 @@ This is a list of devices that were tested by the community and reported as full
 * https://openwrt.org/toh/arc/freestation[Flex mARC] 
 * https://openwrt.org/toh/wd/n600[Western Digital My Net N600] 
 * https://openwrt.org/toh/gl.inet/gl-ar300m[GL.iNet GL-AR300M16]
-* https://openwrt.org/inbox/toh/xiaomi/xiaomi_mi_router_4a_gigabit_edition[Xiaomi Mi Router 4A Gigabit Edition v1] v2 cannot be flashed with OpenWrt and there is no indication on the box for understanding if you are buying v1 or v2
+
+== Supported only in the release candidate
+
+This is hardware that has been tested and works, but only with the latest LibreMesh code that is compiled on top of OpenWrt 22.03.
+
+* https://openwrt.org/inbox/toh/xiaomi/xiaomi_mi_router_4a_gigabit_edition[Xiaomi Mi Router 4A Gigabit Edition v1] v2 cannot be flashed with OpenWrt and there is no indication on the box for understanding if you are buying v1 or v2. Also, requires the 
+* https://openwrt.org/toh/hwdata/plasma_cloud/plasma_cloud_pa1200[Plasma Cloud PA1200]
 
 == Specific Devices Instructions