MAINTAINERS: Update HiSilicon SPI Controller driver maintainer

Add Yang Shen as the maintainer of the HiSilicon SPI Controller driver,
replacing Jay Fang.

Signed-off-by: Yang Shen <shenyang39@huawei.com>
Reviewed-by: Jay Fang <f.fangjian@huawei.com>
Link: https://patch.msgid.link/20250529061406.183992-1-shenyang39@huawei.com


Signed-off-by: Mark Brown <broonie@kernel.org>