Add directory listing to uefifs
    
    - Add -fno-reorder-functions for EFI builds
    - Clean up if EFI graphics init fails
    - Avoid crash if there's no pxe handles
    - fix efigraph allocation error
    - Check harder for GPT
    - Relocate the kernel properly
    - Limit PCI root conf access to Intel
    - Fix uefifs case-sensitivity issue