spi: tegra20-slink: Don't use resource-managed spi_register helper

Don't use resource-managed spi_register helper to correct the driver
removal order and make it to match the error unwinding order of the
probe function.

Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
Link: https://lore.kernel.org/r/20210731192731.5869-2-digetx@gmail.com


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