MAINTAINERS: Add entry for X-Powers AXP family PMIC drivers

Add an entry for X-Powers AXP family PMIC drivers and list myself
as maintainer.

Signed-off-by: Chen-Yu Tsai <wens@csie.org>
Acked-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
diff --git a/MAINTAINERS b/MAINTAINERS
index 1c32f8a..f4ba273 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -12150,6 +12150,12 @@
 F:	kernel/workqueue.c
 F:	Documentation/workqueue.txt
 
+X-POWERS MULTIFUNCTION PMIC DEVICE DRIVERS
+M:	Chen-Yu Tsai <wens@csie.org>
+L:	linux-kernel@vger.kernel.org
+S:	Maintained
+N:	axp[128]
+
 X.25 NETWORK LAYER
 M:	Andrew Hendry <andrew.hendry@gmail.com>
 L:	linux-x25@vger.kernel.org