xorg: add monitor configuration for hdmi0

system/xorg/10-monitor.conf

@@ -8,11 +8,17 @@ Section "Monitor"
 	Option "Primary" "true"
 EndSection
 
+Section "Monitor"
+	Identifier "HDMI0"
+	Option "Above" "DisplayPort0"
+EndSection
+
 Section "Device"
 	Identifier "Device0"
 	Driver "amdgpu"
 	Option "Monitor-DisplayPort-1" "DisplayPort0"
 	Option "Monitor-DVI-D-0" "DVI0"
+	Option "Monitor-HDMI-A-1" "HDMI0"
 	Option "TearFree" "true"
 EndSection