Hi, It seems MDK-Middleware software pack does not include Ethernet PHY drivers (such as DP83848C) anymore! I have downloaded all recent versions of the pack. From version 7.6.0, it only has a "custom" template for Ethernet PHY. Version 7.5.0 is the last version that includes the drivers. Why is that?!
CMISIS Ethernet PHY drivers have been moved to the CMSIS Driver pack: http://www.keil.com/dd2/pack/
You can install the pack also directly from the pack installer.
Thanks Robert! :)