gpio: add support for MediaTek MT7621 SoC

This patch makes mt7621_gpio driver available for MediaTek MT7621 SoC

Reviewed-by: Stefan Roese <sr@denx.de>
Signed-off-by: Weijie Gao <weijie.gao@mediatek.com>
diff --git a/drivers/gpio/Kconfig b/drivers/gpio/Kconfig
index 3c73a7f..aaa152f 100644
--- a/drivers/gpio/Kconfig
+++ b/drivers/gpio/Kconfig
@@ -553,7 +553,7 @@
 
 config MT7621_GPIO
 	bool "MediaTek MT7621 GPIO driver"
-	depends on DM_GPIO && SOC_MT7628
+	depends on DM_GPIO && (SOC_MT7621 || SOC_MT7628)
 	default y
 	help
 	  Say yes here to support MediaTek MT7621 compatible GPIOs.