regulator: Kconfig: Fix spelling mistake "regualtor" -> "regulator"

There is a spelling mistake in the REGULATOR_RT4803 config. Fix it.

Signed-off-by: Colin Ian King <colin.i.king@gmail.com>
Link: https://patch.msgid.link/20250724113113.143009-1-colin.i.king@gmail.com


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