gpio: npcm: Add SGPIO support for Nuvoton NPCM SoCs

Add Nuvoton BMC NPCM7xx/NPCM8xx sgpio driver.
BMC can use this driver to increase 64 GPI pins and 64 GPO pins to use.

Signed-off-by: Jim Liu <JJLIU0@nuvoton.com>
diff --git a/drivers/gpio/Makefile b/drivers/gpio/Makefile
index 4a29315..cc54df4 100644
--- a/drivers/gpio/Makefile
+++ b/drivers/gpio/Makefile
@@ -27,6 +27,7 @@
 obj-$(CONFIG_MXC_GPIO)	+= mxc_gpio.o
 obj-$(CONFIG_MXS_GPIO)	+= mxs_gpio.o
 obj-$(CONFIG_NPCM_GPIO)      	+= npcm_gpio.o
+obj-$(CONFIG_NPCM_SGPIO)	+= npcm_sgpio.o
 obj-$(CONFIG_PCA953X)		+= pca953x.o
 obj-$(CONFIG_ROCKCHIP_GPIO)	+= rk_gpio.o
 obj-$(CONFIG_RCAR_GPIO)		+= gpio-rcar.o