Fix kexec on hosts with AMD GPUs

There seems to be a known problem with modesetting during early boot
that surfaces especially during kexec.  The systems kexec fine without
this setting, but the displays stay sleeping.

data/node/falcon.yaml

@@ -23,6 +23,8 @@ nest::kernel_cmdline:
   - 'intel_iommu=on'
   - 'pci-stub.ids=10de:0fbc,1912:0014'
   - 'intel_idle.max_cstate=2'
+  - 'video=DP-1:2560x1440@60'
+  - 'video=DP-2:2560x1440@60'
 nest::kernel_config:
   CONFIG_CPU_FREQ_DEFAULT_GOV_PERFORMANCE: y
   CONFIG_CPU_FREQ_DEFAULT_GOV_USERSPACE: n

data/node/hawk.yaml

@@ -5,6 +5,9 @@ classes:
 nest::bootloader: systemd
 nest::fileserver: true
 nest::isolate_smt: true
+nest::kernel_cmdline:
+  - 'video=DP-1:2560x1440@60'
+  - 'video=DP-2:2560x1440@60'
 nest::kernel_config:
   CONFIG_CPU_FREQ_DEFAULT_GOV_PERFORMANCE: y
   CONFIG_CPU_FREQ_DEFAULT_GOV_USERSPACE: n