[PATCH 5/8] dmaengine: bcm2835: move controlblock chain generation into separate method

From: Martin Sperl In preparation of adding slave_sg functionality this patch moves the generation/allocation of bcm2835_desc and the building of the corresponding DMA-control-block chain from bcm2835_dma_prep_dma_cyclic into the newly created method

[PATCH 5/8] dmaengine: bcm2835: move controlblock chain generation into separate method

From: Martin Sperl In preparation of adding slave_sg functionality this patch moves the generation/allocation of bcm2835_desc and the building of the corresponding DMA-control-block chain from bcm2835_dma_prep_dma_cyclic into the newly created method bcm2835_dma_create_cb_chain. Signed-off-by: