PATCH: Add non-Virtex 5 support for LL TEMAC driver

[John Tyner]

This patch adds support for using the LL TEMAC Ethernet driver on 
non-Virtex 5 platforms by adding support for accessing the Soft DMA 
registers as if they were memory mapped instead of solely through the 
DCR's (available on the Virtex 5).

Signed-off-by: John Tyner <jtyner at cs.ucr.edu>
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