Create script to add / remove efibootmgr entries

[sundarnagarajan]

Related to following issues:

• Issue 38: No bootup in linux
• Issue 33: Ubuntu not booting up
• Issue 31: Not Able To Boot

Primarily this is an upstream bug - distro does not call efibootmgr properly to add boot entry.
It could be that distro tries to create boot entry with bootia64.efi and RDP-1430 with older UEFI / BIOS/ firmware only supports 32-bit EFI applications.

To create a boot entry using efibootmgr, we need:

• Disk device with EFI partition
• EFI partition number on disk - can be found automatically using bootutils scripts
• Path to bootia32.efi (or bootia64.efi)

Script design:
Parameters:

• Operation: add or remove
• Disk device
• If operation == 'add':
  • --32bit or --64bit - will choose .efi file
  • --efi_file=bootia32.efi or --efi_file=bootia64.efi (or anything else that exists)
    If --efi_file is provided, --32bit and --64bit are IGNORED
• If operation == 'delete':
  • Entry number