Remove limited choice for vga option in proxmox_kvm (#185)

* Remove limited choice for vga option in proxmox_kvm

* Refer to Proxmox documentation for vga option in proxmox_kvm

Author: fredericgiquel

changelogs/fragments/185-change-vga-option-kvm.yaml

@@ -0,0 +1,3 @@
+---
+bugfixes:
+  - proxmox_kvm - remove limited choice for vga option in proxmox_kvm (https://github.com/ansible-collections/community.proxmox/pull/185)

plugins/modules/proxmox_kvm.py

@@ -543,8 +543,9 @@
   vga:
     description:
       - Select VGA type. If you want to use high resolution modes (>= 1280x1024x16) then you should use option V(std) or V(vmware).
+      - Please refer to the Proxmox VE Administrator Guide, section QEMU/KVM Virtual Machines (see
+        U(https://pve.proxmox.com/pve-docs/chapter-qm.html#qm_options)) for more information on possible values.
     type: str
-    choices: ['std', 'cirrus', 'vmware', 'qxl', 'serial0', 'serial1', 'serial2', 'serial3', 'qxl2', 'qxl3', 'qxl4']
   virtio:
     description:
       - A hash/dictionary of volume used as VIRTIO hard disk. O(virtio='{"key":"value", "key":"value"}').
@@ -1314,7 +1315,7 @@ def main():
         update=dict(type='bool', default=False),
         update_unsafe=dict(type='bool', default=False),
         vcpus=dict(type='int'),
-        vga=dict(choices=['std', 'cirrus', 'vmware', 'qxl', 'serial0', 'serial1', 'serial2', 'serial3', 'qxl2', 'qxl3', 'qxl4']),
+        vga=dict(type='str'),
         virtio=dict(type='dict'),
         vmid=dict(type='int'),
         watchdog=dict(),