Use set_get_all for key pressing

This reduces the number of RPC calls from 9 to 1, and also reduces the
delay between each servo control.

BUG=chrome-os-partner:19320
TEST=Run firmware_SelfSignedBoot and see key pressed with set_get_all.

Change-Id: I4d601d23bc487630ff68be1d2e6a9e83352b6fea
Signed-off-by: Vic Yang <victoryang@chromium.org>
Reviewed-on: https://gerrit.chromium.org/gerrit/55875
Reviewed-by: Tom Wai-Hong Tam <waihong@chromium.org>
1 file changed