S5L8702: Move I/O addresses from DMA driver to SoC definitions, reuse existing definitions
No difference in the produced binaries for ipod6g (normal and bootloader)
This is a part of the large iPod Nano 3G and iPod Nano 4G support patch.
Change-Id: I82943e91ba7e6764428f853f84799f0d54b700a6