Marek Vasut c7065fa824 MX28: SPI: Refactor spi_xfer a bit
This makes it easier to adapt for addition of DMA support.

Signed-off-by: Marek Vasut <marex@denx.de>
Cc: Fabio Estevam <festevam@gmail.com>
Cc: Otavio Salvador <otavio@ossystems.com.br>
Cc: Stefano Babic <sbabic@denx.de>
Cc: Wolfgang Denk <wd@denx.de>
2012-09-01 14:58:16 +02:00
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