regulator: Fix a couple of spelling mistakes in Kconfig

There are a couple of spelling mistakes in the Kconfig text. Fix them.

Signed-off-by: Colin Ian King <colin.king@canonical.com>
Link: https://lore.kernel.org/r/20210719103429.15544-1-colin.king@canonical.com


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