Print error message before PMU hard reset
Print error message before PMU hard reset

Hard-reset triggers a pulse on the PMIC_RESET pin but this is hard to
see when debugging. By printing error message explicitly before
resetting the board, it's easier to tell why the board is resetting.

BUG=chrome-os-partner:19778
TEST=Trivial change. Build and boot on Spring. Make sure system is
alive.
BRANCH=spring

Change-Id: I26b749af2f8760339373c3e4db46c59d7b0d039e
Signed-off-by: Vic Yang <5fd92abeee651458f98e2856f4f200ee971cee4d@chromium.org>
Reviewed-on: https://gerrit.chromium.org/gerrit/57101
Reviewed-by: Randall Spangler <62698fdbb84d1779579ee80c3f39fac22017e5bc@chromium.org>
Reviewed-by: Vincent Palatin <70a9964ec8fd10b0b08fcc8623c2add25ddf99ac@chromium.org>

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