MAINTAINERS: add entry for i2c-axxia driver

Create separate entry for i2c-axxia and set myself as maintainer.

Even though I don't work for Intel/LSI who is the manufacturer of this
IP, I do have access to some documentation and the actual hardware using
this driver and I'm familiar with the code.
Signed-off-by: Krzysztof Adamski <krzysztof.adamski@nokia.com>
Reviewed-by: Alexander Sverdlin <alexander.sverdlin@nokia.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>

MAINTAINERS

@@ -2629,6 +2629,13 @@ S:	Maintained
 F:	Documentation/devicetree/bindings/sound/axentia,*
 F:	sound/soc/atmel/tse850-pcm5142.c
 
+AXXIA I2C CONTROLLER
+M:	Krzysztof Adamski <krzysztof.adamski@nokia.com>
+L:	linux-i2c@vger.kernel.org
+S:	Maintained
+F:	Documentation/devicetree/bindings/i2c/i2c-axxia.txt
+F:	drivers/i2c/busses/i2c-axxia.c
+
 AZ6007 DVB DRIVER
 M:	Mauro Carvalho Chehab <mchehab@kernel.org>
 L:	linux-media@vger.kernel.org