Set the desired PXE/UEFI value via mlxconfig. Run:
mlxconfig -d <device> set <option> = (Values- 0: False, 1: True)
Options:
EXP_ROM_UEFI_ARM_ENABLE
EXP_ROM_UEFI_x86_ENABLE
EXP_ROM_PXE_ENABLE
Note
The Enable/Disable sections above will expose/hide the device as a boot option.