xilinx-zynqmp: add CONFIG_GPIO_ZYNQMP_MODEPIN for zynqmp

Add this kernel option to enable zynqmp gpio-modepin driver.

Signed-off-by: Quanyang Wang <quanyang.wang@windriver.com>
Signed-off-by: Bruce Ashfield <bruce.ashfield@gmail.com>

bsp/xilinx-zynqmp/xilinx-zynqmp.cfg

@@ -77,6 +77,7 @@ CONFIG_GPIO_XILINX=y
 CONFIG_GPIO_PCA953X=y
 CONFIG_GPIO_PCA953X_IRQ=y
 CONFIG_GPIO_ZYNQ=y
+CONFIG_GPIO_ZYNQMP_MODEPIN=y
 
 CONFIG_POWER_RESET=y
 CONFIG_SENSORS_INA2XX=y