input: touchscreen: pull down reset and interrupt pin before GT9xx powerup

According to vendor's suggestion, reset pin and interrupt pin must be
pulled down before touchpanel controller power up. This is required
for all Goodix devices.

Change-Id: If16fab02967abbd0c2a6e4365fed76f9e8729bc2
Signed-off-by: Bingzhe Cai <bingzhec@codeaurora.org>