input: synaptics_dsx: free gpios in probe error path

Free the reset and irq gpio in Synaptics v2 touch driver
probe error path properly.
Earlier, the driver is not able to free the gpios if
"synaptics,disable-gpio" dt property is not defined.
Freeing the resources should not be based on the dt
property at all.

Change-Id: Ifffdf97de165a6f7f40b4d18d9b05f00ec5c0b86
Signed-off-by: Shantanu Jain <shjain@codeaurora.org>