reset: tps380x: Fix spelling mistake "Voltags" -> "Voltage"

There is a spelling mistake in the MODULE_DESCRIPTION text. Fix it.

Signed-off-by: Colin Ian King <colin.i.king@gmail.com>
Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
Link: https://lore.kernel.org/r/20220728110554.18320-1-colin.i.king@gmail.com