spi: fsl-lpspi: clean up indentation issue

The complete call is indented incorrectly, remove the extraneous tabs.

Signed-off-by: Colin Ian King <colin.king@canonical.com>
Link: https://lore.kernel.org/r/20190926113701.26986-1-colin.king@canonical.com
Signed-off-by: Mark Brown <broonie@kernel.org>