MAINTAINERS: Add section for MediaTek MMC/SD/SDIO driver

Cc: Chaotian Jing <chaotian.jing@mediatek.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Acked-by: Chaotian Jing <chaotian.jing@mediatek.com>

MAINTAINERS

@@ -9775,6 +9775,12 @@ F:	drivers/media/platform/mtk-vpu/
 F:	Documentation/devicetree/bindings/media/mediatek-vcodec.txt
 F:	Documentation/devicetree/bindings/media/mediatek-vpu.txt
 
+MEDIATEK MMC/SD/SDIO DRIVER
+M:	Chaotian Jing <chaotian.jing@mediatek.com>
+S:	Maintained
+F:	drivers/mmc/host/mtk-sd.c
+F:	Documentation/devicetree/bindings/mmc/mtk-sd.txt
+
 MEDIATEK MT76 WIRELESS LAN DRIVER
 M:	Felix Fietkau <nbd@nbd.name>
 M:	Lorenzo Bianconi <lorenzo.bianconi83@gmail.com>