input: synaptics_i2c_rmi4: configure gpio using pinctrl or gpio lib

Configure gpio using either pinctrl or gpio lib.

This patch is propagated from msm-3.10 kernel
(commit: 297bd187b179e9f9ced02c5e35e6c391f93537a1
input: synaptics_i2c_rmi4: configure gpio using pinctrl or gpio lib)

Change-Id: I43278222dd77e961015653df535fd25408e4d6bf
Signed-off-by: Mao Li <maol@codeaurora.org>