drivers/spi/spi-tegra114.c clean use of devm_ioremap_resource()

Check of 'r' and calls to dev_err are already done in devm_ioremap_resource,
so no need to do them twice.

Signed-off-by: Laurent Navet <laurent.navet@gmail.com>
Signed-off-by: Mark Brown <broonie@linaro.org>