only set EFI secure boot for gen 2 machines in hyperv provider

plugins/providers/hyperv/scripts/import_vm.ps1

@@ -136,12 +136,15 @@ $vm | Set-VM @more_vm_params -Passthru
 # Add drives to the virtual machine
 $controllers = Select-Xml -xml $vmconfig -xpath "//*[starts-with(name(.),'controller')]"
 
+# Only set EFI secure boot for Gen 2 machines, not gen 1
+if ($generation -ne 1) {
 	# Set EFI secure boot 
 	if ($secure_boot_enabled -eq "True") {
 		Set-VMFirmware -VM $vm -EnableSecureBoot On
 	}  else {
 		Set-VMFirmware -VM $vm -EnableSecureBoot Off
 	}
+}
 
 # A regular expression pattern to pull the number from controllers
 [regex]$rx="\d"