input: synaptics_2.6: add pin control func for TMO project

Add pinctrl func to make sure S2333's irq and pwr pins could be
pulled up when probed and resumed. Furthermore, they should be
pulled down when suspended and removed.

CRs-Fixed: 1020158
Change-Id: If517747243a605eacd1f6ffd6d1f7c0d45d06c1b
Signed-off-by: Changmin Liu <changmil@codeaurora.org>