keyboard: Fix kbpress after recent keyboard change
keyboard: Fix kbpress after recent keyboard change

After commit 98ab7484d331 ("keyboard: prevent races enabling/disabling
kb scanning") kbpress was totally broken, which wasn't so good for
FAFT.  Fix it by making sure we go into polling mode for simulated
keyboard presses.

BUG=chrome-os-partner:48849
TEST=kbpress works

Change-Id: Icd663c2ee7a184e6af4438368595087b35724a4f
Signed-off-by: Douglas Anderson <49983c4a76b998672954ed5edf4a62db4a336502@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/319586
Reviewed-by: Randall Spangler <62698fdbb84d1779579ee80c3f39fac22017e5bc@chromium.org>

akappy7/ChromeOS_EC_LED_Diagnostics,coreboot/chrome-ec,coreboot/chrome-ec,akappy7/ChromeOS_EC_LED_Diagnostics,akappy7/ChromeOS_EC_LED_Diagnostics,coreboot/chrome-ec,akappy7/ChromeOS_EC_LED_Diagnostics,coreboot/chrome-ec,akappy7/ChromeOS_EC_LED_Diagnostics,coreboot/chrome-ec,coreboot/chrome-ec