staging: mt7621-mmc: Refactor dma setup process
Current code uses two functions for dma setup, msdc_dma_config and msdc_dma_setup. By now msdc_dma_setup is nearly empty and mainly calls msdc_dma_config, so the later one can be inline into the first one. While doing this there is also some refactoring done. Signed-off-by: Christian Lütke-Stetzkamp <christian@lkamp.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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