input: synaptics_i2c_rmi4: configure gpio using pinctrl

correct the pinctrl configuration for the synaptics touch
controller. Configure the pinctrl and gpio in touch controller
suspend/resume method to avoid the current leak in the device
suspend state.

Change-Id: Ib372f70189dd35c2eca9bb69a40ec1d6f3f23f5e
Signed-off-by: Sarada Prasanna Garnayak <c_sgarna@codeaurora.org>