mb/google/poppy/variants/nami: Enable Synaptics touchpad

BUG=b:74595037
TEST=
1. emerge-nami coreboot chromeos-bootimage
2. check touchpad function
3. evtest
/dev/input/event5:	PNP0C50:00 06CB:CD84

Change-Id: I47cb1b13881f0d52860f0afe4bbca7483409de54
Signed-off-by: ivy_jian <ivy_jian@compal.corp-partner.google.com>
Reviewed-on: https://review.coreboot.org/25913
Reviewed-by: Furquan Shaikh <furquan@google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
1 file changed