Accton x86_64: Disable onie-syseeprom in i2ctools

The x86_64 platforms are including:
- AS5712_54X
- AS6712_32X
Accton Platforms: Enable busybox onie-syseeprom command

The platforms are including:
- AS4600_54T
- AS5600_52X
- AS5610_52X
- AS5710_54X
- AS5712_54X
- AS6700_32X
- AS6701_32X
- AS6710_32X
- AS6712_32X
Accton x86_64: Add patches for onie-syseeprom in busybox

The patches are to enlarge the delay of i2c writing 2bytes to
sys_eeprom.  The patches were for i2ctools and are migrated to
busybox now.

The x86_64 platforms are including:
- AS5712_54X
- AS6712_32X
Accton x86_64: Remove patches for onie-syseeprom from i2ctools

The x86_64 platforms are including:
- AS5712_54X
- AS6712_32X
Accton x86_64: Remove script of updating sys_eeprom from installer.conf

The ONIE updater is able to refresh 'platform' and 'ver' in sys_eeprom
so that the script is removed from now on.

The x86_64 platforms are including:
- AS5712_54X
- AS6712_32X