The following changes were made to sync up the DMA code between the 85xx
and 86xx architectures which will make it easier to break out common
8xxx DMA code:

85xx:
- Don't set STRANSINT and SPCIORDER fields in SATR register.  These bits
  only have an affect when the SBPATMU bit is set.
- Write 0xffffffff instead of 0xfffffff to clear errors in the DMA
  status register.  We may as well clear all 32 bits of the register...

86xx:
- Add CONFIG_SYS_MPC86xx_DMA_ADDR define to address DMA registers
- Add clearing of errors in the DMA status register when initializing
  the controller
- Clear the channel start bit in the DMA mode register after a transfer

Signed-off-by: Peter Tyser <ptyser@xes-inc.com>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>