dmaengine: at_hdmac: remove unused function
dmaengine: at_hdmac: remove unused function

commit 54f8d501e8428 ('dmaengine: remove DMA unmap from drivers')
refactored some code which resulted in an unused function in the at_hdmac
driver:

drivers/dma/at_hdmac_regs.h:350:23: warning: 'chan2parent' defined but
    not used [-Wunused-function]

Fixes: 54f8d501e8428 ('dmaengine: remove DMA unmap from drivers')
Signed-off-by: Olof Johansson <8c69ee23f3f44f8162a64d579c1fa25c2f55298a@lixom.net>
Cc: Bartlomiej Zolnierkiewicz <24970bf3d8506c473367e9292a8e5eb43a40bda0@samsung.com>
Acked-by: Nicolas Ferre <45b517be0e5ec6dc3a39715767c1d18e090d39b4@atmel.com>
Acked-by: Bartlomiej Zolnierkiewicz <24970bf3d8506c473367e9292a8e5eb43a40bda0@samsung.com>
Acked-by: Vinod Koul <5cf69c63beb17bf38d63aa0e923ee8256af0e205@Intel.com>
Signed-off-by: Dan Williams <24ee2bf0bd8ac766c348bf1f0639943bac1535c6@intel.com>

KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs