Add Pi 400 rev 1.1 & 4B rev 1.5 to table
There are rev 1.1 Pi 400's in the wild with a different Ethernet PHY.
Also add rev 1.5 Pi 4B's after visual confirmation the change relates to chip 2nd sourcing on chips managed by the VideoCore.
Confirmation that 1GB Pi 4B's are also now back in production due to DRAM shortages.