network: Disable wifi powersave on pinebookpro

The wifi powersave feature seems to cause the device to hang randomly or
over time.  Pine64 wiki recommends disabling powersave.  Who knows what
kind of effect it'll have on my battery life, but we'll see.  Revisit
this when new firmware is available.

manifests/base/network.pp

@@ -18,13 +18,33 @@ class nest::base::network {
     unmanaged-devices=interface-name:docker*,interface-name:tun0,interface-name:virbr*,interface-name:vnet*
     | EOT
 
-  file { '/etc/NetworkManager/NetworkManager.conf':
-    mode    => '0644',
-    owner   => 'root',
-    group   => 'root',
-    content => $networkmanager_conf,
-    require => Package['net-misc/networkmanager'],
-    notify  => Service['NetworkManager'],
+  $pinebookpro_conf_ensure = $::nest::platform ? {
+    'pinebookpro' => present,
+    default       => absent,
+  }
+
+  $pinebookpro_conf_content = @(CONF)
+    [connection-wifi-wlan0]
+    wifi.powersave=off
+    | CONF
+
+  file {
+    default:
+      mode    => '0644',
+      owner   => 'root',
+      group   => 'root',
+      require => Package['net-misc/networkmanager'],
+      notify  => Service['NetworkManager'],
+    ;
+
+    '/etc/NetworkManager/NetworkManager.conf':
+      content => $networkmanager_conf,
+    ;
+
+    '/etc/NetworkManager/conf.d/10-pinebookpro.conf':
+      ensure  => $pinebookpro_conf_ensure,
+      content => $pinebookpro_conf_content,
+    ;
   }
 
   service { 'NetworkManager':