This patch fixes the build regression on 4.14 build
due to dt-bindings/dma/dw-dmac.h MIA.
apm82181.dtsi:24:10: fatal error: dt-bindings/dma/dw-dmac.h: No such file or directory
Fixes: 32141c183a ("apm821xx: add linux 4.19 apm821xx patches")
Signed-off-by: Christian Lamparter <chunkeey@gmail.com>