title: Access BIOS/UEFI menu setting via uefi shell
body: <p>I´d like to read/alter some BIOS/UEFI menu settings via a uefi shell script.</p>
  
  <p>For example I´d like to change the 'CSM Support' setting (Enabled/Disabled).</p>
  
  <p>Is there any way to do so?</p>