CVE-2025-21682 eth: bnxt: always recalculate features after XDP clearing, fix null-deref

In the Linux kernel, the following vulnerability has been resolved: eth: bnxt: always recalculate features after XDP clearing, fix null-deref Recalculate features when XDP is detached. Before: ip li set dev eth0 xdp obj xdpdummy.bpf.o sec xdp ip li set dev eth0 xdp off ethtool -k eth0 | grep gro...