The patch is included in the kernel (master branch) and it was cherry-picked and included in
kernel 4.14.158.

More details:
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/drivers/net/dsa/mv88e6xxx?h=v4.14.158&id=ef36d52351c96506328043423655cf674173d8e1