CVE-2025-71191 dmaengine: at_hdmac: fix device leak on of_dma_xlate()

In the Linux kernel, the following vulnerability has been resolved: dmaengine: athdmac: fix device leak on ofdmaxlate Make sure to drop the reference taken when looking up the DMA platform device during ofdmaxlate when releasing channel resources. Note that commit 3832b78b3ec2 "dmaengine: athdmac...