mediatek: mt8195: Add gpio driver

Add gpio driver.

Change-Id: I6ff6875c35294f56f2d8298d75cd18c230aad211
diff --git a/plat/mediatek/mt8192/bl31_plat_setup.c b/plat/mediatek/mt8192/bl31_plat_setup.c
index 0040747..94ec1b5 100644
--- a/plat/mediatek/mt8192/bl31_plat_setup.c
+++ b/plat/mediatek/mt8192/bl31_plat_setup.c
@@ -98,7 +98,7 @@
 	mt_gic_driver_init();
 	mt_gic_init();
 
-	plat_mt8192_gpio_init();
+	mt_gpio_init();
 	mt_systimer_init();
 	generic_delay_timer_init();
 	spm_boot_init();