MAINTAINERS: Update HiSilicon SFC Driver maintainer

Add Jay Fang as the maintainer of the HiSilicon SFC Driver, replacing
John Garry.

Signed-off-by: Jay Fang <f.fangjian@huawei.com>
Acked-by: John Garry <john.garry@huawei.com>
Link: https://lore.kernel.org/r/20221028023739.4113998-1-f.fangjian@huawei.com
Signed-off-by: Mark Brown <broonie@kernel.org>