regulator: rtmv20: Fix wrong mask for strobe-polarity-high

Fix wrong mask for strobe-polarity-high.

Signed-off-by: ChiYuan Huang <cy_huang@richtek.com>
In-reply-to: <CAFRkauB=0KwrJW19nJTTagdHhBR=V2R8YFWG3R3oVXt=rBRsqw@mail.gmail.com>
Reviewed-by: Axel Lin <axel.lin@ingics.com>
Link: https://lore.kernel.org/r/1624723112-26653-1-git-send-email-u0084500@gmail.com


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