1. Poweroff the HoneyComb board by asserting SUS_S5# signal
2. Add USB3.0 DWC3 workaround by disabling parkmode
3. Keep flexspi divisor as default which is ~17MHz. This enables using
the carrier board SPI that is limited in speed due to the analogue mux
connected to it.
4. Remove uefi build and update LSDK20.04 to may-29 update. UEFI is
temporarily hosted at https://github.com/SolidRun/lx2160a_uefi until
fully upstreamed.
5. Add 4x25Gbps MC config
Signed-off-by: Rabeeh Khoury <rabeeh@solid-run.com>