CVE-2025-68220 net: ethernet: ti: netcp: Standardize knav_dma_open_channel to return NULL on error

In the Linux kernel, the following vulnerability has been resolved: net: ethernet: ti: netcp: Standardize knavdmaopenchannel to return NULL on error Make knavdmaopenchannel consistently return NULL on error instead of ERRPTR. Currently the header include/linux/soc/ti/knavdma.h returns NULL when t...