MAINTAINERS: Add entry for Intel pin controller drivers

Add MAINTAINERS entry for Intel pin controller drivers. I will be
maintaining them with Heikki, who kindly promised to help me with this.
Signed-off-by: NHeikki Krogerus <heikki.krogerus@linux.intel.com>
Signed-off-by: NMika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: NLinus Walleij <linus.walleij@linaro.org>

MAINTAINERS

@@ -7163,6 +7163,12 @@ L:	linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
 S:	Maintained
 F:	drivers/pinctrl/pinctrl-at91.*
 
+PIN CONTROLLER - INTEL
+M:	Mika Westerberg <mika.westerberg@linux.intel.com>
+M:	Heikki Krogerus <heikki.krogerus@linux.intel.com>
+S:	Maintained
+F:	drivers/pinctrl/intel/
+
 PIN CONTROLLER - RENESAS
 M:	Laurent Pinchart <laurent.pinchart@ideasonboard.com>
 L:	linux-sh@vger.kernel.org