Restore SW:Linux:WiFi page from the wiki history

This reverts commit b6a50ae.

Author: davide125

docs/SW-Linux-WiFi.md

@@ -0,0 +1,31 @@
+# WiFi Support
+## Under MacOS grab the WiFi firmware as per [Glanzmann's notes](https://tg.st/u/asahi.txt)
+ * Clone the installer  
+`git clone https://github.com/AsahiLinux/asahi-installer`
+ * Go into the src directory 
+`cd asahi-installer/src`
+ * Grab the firmware into a tar file 
+`python3 -m firmware.wifi /usr/share/firmware/wifi /tmp/linux-firmware.tar`
+## Install firmware
+ * Under Linux booted via [USB drive](https://github.com/AsahiLinux/docs/wiki/SW:Linux:USB-drive) or [nvme](https://github.com/AsahiLinux/docs/wiki/SW:Linux:NVME) rootfs Create the firmware directory:
+`sudo mkdir -p /usr/lib/firmware`
+ * Install the wifi firmware you extracted earlier
+`sudo tar -C /usr/lib/firmware -xf firmware.tar`
+ * Install any other networking / WiFi packages you will need. e.g. wpasupplicant 
+## Enable WiFi
+ * You need to have built a Asahi Linux kernel with the M1 WiFI support such as the [wifi/take5](https://github.com/AsahiLinux/linux/tree/wifi/take5) branch
+ * Before you boot that kernel via [m1n1 over USB](https://github.com/AsahiLinux/docs/wiki/SW:Linux#directly) - run this script to enable the WiFi hardware
+`python3 ./proxyclient/experiments/pcie_enable_devices.py`
+ * There are other ways to do this - this what I did under Debian linux
+ * Now after the linux kernel has booted you should be able to see a WiFi device (wlan0) via the usual tools 
+`ip a l`
+ * You can start networking the usual Linux tools e.g.
+  * Edit the configuration file:
+```
+auto wlan0
+iface wlan0 inet dhcp
+    wpa-ssid YOUR_SSID
+    wpa-psk YOUR_WIFI_PASSPHRASE
+```
+ * Then start up the interface (wlan0) via (note -v => verbose info)
+`sudo ifup -v wlan0`