Hardware scrolling for RiscPC/A7000/NC wscons

Reinoud Zandijk has committed code for hardware scrolling for the RiscPC and compatibles. This new code has been tested in different screen resolutions and depths, and its all worked ok so far. It even appears to run faster than the original vidcconsole code. More details are available in Reinoud's announcement in the port-arm32 mail archive. [0 comments]