debos: Add firmware packages for radeon GPU

For the record it was needed for radeon GPU (pci=1002:949f):

    kernel: [drm:radeon_pci_probe [radeon]] \
    *ERROR* radeon kernel modesetting for R600 or later \
    requires firmware installed

By the way the 2 outputs need to be adjusted:

    ls /sys/class/drm
    card0  card0-DP-1  card0-DP-2  card0-DVI-I-1  renderD128  ttm  version
    cat /etc/xdg/weston.ini
    [output]
    name=DP-1
    mode=1024x768
    transform=rotate-90
    [output]
    name=DVI-I-1

Generated image is about 1365Mb with 39MB left for i386

Change-Id: I54fe74360a7f0cb6186ee7a25642d805e57822a2
Relate-to: #7
Signed-off-by: Philippe Coval <[email protected]>

Author: rzr

extra/debos/machine/generic/actions.yaml

@@ -23,19 +23,21 @@ actions:
         flags: [boot]
 
   - action: apt
-    packages: [
+    packages:
       {{if eq $architecture "i386" "amd64"}}
-      grub-pc,
+      - grub-pc
       {{end}}
       {{if eq $suite "unstable" "sid" "testing" "bullseye"}}
-      linux-image-generic,
+      - linux-image-generic
       {{else}}
       {{if eq $suite "buster" "stable"}}
       {{if eq $architecture "i386"}}
-      linux-image-686
+      - linux-image-686
       {{else}}
-      linux-image-{{$architecture}}
+      - linux-image-{{$architecture}}
       {{end}}
       {{end}}
-      {{end}}   
-    ]
+      {{end}}
+      - firmware-linux-free
+      - firmware-linux-nonfree
+