Switch to use modern name function devm_spi_alloc_host().

No functional changed.
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>
Link: https://msgid.link/r/20231128093031.3707034-26-yangyingliang@huawei.comSigned-off-by: Mark Brown <broonie@kernel.org>