wiki: Skip fastboot instructions for devices using boot_stack template

Change-Id: I106b2571d8d1ccc0cdbf2e57681a70e29d539b2f

_includes/templates/recovery_install_fastboot_generic.md

@@ -19,6 +19,7 @@
 1. [Build]({{ device | device_link: "/build" | relative_url }}) a LineageOS installation package. The recovery will be built as part of it!
 {%- endif %}
     {% include alerts/important.html content="Other recoveries may not work for installation or updates. We strongly recommend to use the one linked above!" %}
+{%- if device.before_recovery_install.instructions != "boot_stack" %}
 2. Connect your device to your PC via USB if it isn't already.
 {%- if device.has_no_usb %}
 3. Boot into fastboot mode via a key combination:
@@ -43,6 +44,7 @@ fastboot devices
    * on Linux or macOS: If you see `no permissions fastboot` try running `fastboot` as root. When the output is empty, check your USB cable (preferably use a USB Type-A 2.0 one or a USB hub) and port!
 
    {% include alerts/tip.html content="Some devices have buggy USB support while in bootloader mode, if you see `fastboot` hanging with no output when using commands such as `fastboot getvar ...`, `fastboot boot ...`, `fastboot flash ...` you may want to try a different USB port (preferably a USB Type-A 2.0 one) or a USB hub." %}
+{%- endif %}
 {%- if device.needs_fastboot_boot %}
 7. Temporarily boot recovery on your device:
 ```