MAINTAINERS: update entry for Mediatek pin controller

Add all source files under drivers/pinctrl/mediatek for the entry and
change the address to a permanent one since I have a personal leave
over the next few months and the address would be suspended for a while.

Cc: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Sean Wang <sean.wang@mediatek.com>
Signed-off-by: Sean Wang <sean.wang@kernel.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

MAINTAINERS

@@ -11489,15 +11489,12 @@ S:	Maintained
 F:	drivers/pinctrl/intel/
 
 PIN CONTROLLER - MEDIATEK
-M:	Sean Wang <sean.wang@mediatek.com>
+M:	Sean Wang <sean.wang@kernel.org>
 L:	linux-mediatek@lists.infradead.org (moderated for non-subscribers)
 S:	Maintained
 F:	Documentation/devicetree/bindings/pinctrl/pinctrl-mt65xx.txt
 F:	Documentation/devicetree/bindings/pinctrl/pinctrl-mt7622.txt
-F:	drivers/pinctrl/mediatek/mtk-eint.*
-F:	drivers/pinctrl/mediatek/pinctrl-mtk-common.*
-F:	drivers/pinctrl/mediatek/pinctrl-mt2701.c
-F:	drivers/pinctrl/mediatek/pinctrl-mt7622.c
+F:	drivers/pinctrl/mediatek/
 
 PIN CONTROLLER - QUALCOMM
 M:	Bjorn Andersson <bjorn.andersson@linaro.org>