ASoC: sgtl5000: Fix identation of .driver elements

The .driver elements are not correctly idented.

Fix the identation of the .driver elements.
Signed-off-by: Fabio Estevam <festevam@gmail.com>
Link: https://lore.kernel.org/r/20210302142817.2141923-1-festevam@gmail.comSigned-off-by: Mark Brown <broonie@kernel.org>