Clear pending interrupt on disabling TSU6721 interrupt
Clear pending interrupt on disabling TSU6721 interrupt

If we disable TSU6721 interrupt without clearing pending interrupt, we
get bogus interrupt after. Let's clear it.

BUG=chrome-os-partner:20336
TEST=Log interrupt. Check there's none after disabling interrupt.
BRANCH=Spring

Original-Change-Id: Ic8e5bcdcea894cccfbdf4b7d9afd43084b0c3309
Signed-off-by: Vic Yang <5fd92abeee651458f98e2856f4f200ee971cee4d@chromium.org>
Reviewed-on: https://gerrit.chromium.org/gerrit/59534
Reviewed-by: Randall Spangler <rspangler@chromium.org>
(cherry picked from commit 0412f17aaf20887fc6ec2598f269841e03b760e4)

Change-Id: I18ba0e4bbfd81e59d30b2d5723f8859e42acadaa
Signed-off-by: Vic Yang <5fd92abeee651458f98e2856f4f200ee971cee4d@chromium.org>
Reviewed-on: https://gerrit.chromium.org/gerrit/59665
Reviewed-by: Vincent Palatin <70a9964ec8fd10b0b08fcc8623c2add25ddf99ac@chromium.org>

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