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Old Snow board (non-MP) don't have the capability to hard-reset their pmics unless they've been manually fixed to do so. This means that if you have an old board, with a new copy of the EC on it and it tries to hard-reset the system, it will hang forever and trigger the watchdog. Since there's no way for the EC to check if the hardware fix exists on its board, this adds a timeout after trying to reset. If the board has the fix, it will reset before the timeout expires. Otherwise, it will print a warning message before returning, to prevent it hanging. Additionally, it also fixes the places board_hard_reset() is called to deal with the new possibility of it returning. BUG=chrome-os-partner:13508 TEST=On a machine with the hardware rework and one without it, go to the EC console and run "pmu reset" to try and force a reset. The one with the fix should reset immediately, and the one without should warn you that it tried (and failed) to reset. BRANCH=snow Change-Id: I493122ee4da539f363a31f624ab9dd7db8068ec8 Signed-off-by: Charlie Mooney <charliemooney@chromium.org> Reviewed-on: https://gerrit.chromium.org/gerrit/32043 Reviewed-by: Vincent Palatin <vpalatin@chromium.org> Reviewed-by: Simon Glass <sjg@chromium.org>