spi: spi-gxp: Use devm_platform_ioremap_resource()

Use the devm_platform_ioremap_resource() helper instead of calling
platform_get_resource() and devm_ioremap_resource() separately.

Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>
Link: https://lore.kernel.org/r/20220928145256.1879256-1-yangyingliang@huawei.com


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