Add to supoprt for Accton as5600_52x
as5600_52x
- To compatible with current NOS installer, keep the model name
  in dts as project name.
as4600_54t

Remove CPLD firmware updating utility from u-boot because of incompatible
with GPL.
as5600_52x

Remove CPLD firmware updating utility from u-boot because of incompatible
with GPL.
Merge commit 227082b1

Allow DHCP to configure interfaces every iteration

The original concept of locking out DHCP interface configuration
once a fall back IP address is configured was flawed.

The problem happens when the DHCP server is unresponsive during
boot up and ONIE uses a default IP configuration.  Later during
the discovery loop if the DHCP server comes back up ONIE will
continue to use the default IP config, i.e. it will not update the
Ethernet management interfaces again.

The only way to recover is for ONIE to reboot and go through the
boot up sequence again.

The fix is to remove the "fallback active" tracking.  The fallback
IP address is only used when the DHCP server is unresponsive.
Merge commit b82ca390

dhcp: increase number of retries

Increase the number of DHCP retries from 5 to 15.

The maximum time spent performing the DHCP option is retries *
pause_between_packets.  pause_between_packets remains at 3
seconds.  Thus the maximum time spent is 45 seconds.

This helps in situations where the upstream switch has STP enabled
and is blocking the port.  Several STP implementations can block a
port for up to 30 seconds before marking it as an edge port.