MAINTAINERS: iio: add co-maintainer to SAMA5D2-compatible ADC driver

Add Eugen as co-maintainer with Ludovic of Microchip SAMA5D2-compatible
ADC driver.
Also add the binding documentation/include as file pattern.
Signed-off-by: Nicolas Ferre <nicolas.ferre@microchip.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>

MAINTAINERS

@@ -2521,9 +2521,12 @@ F:	drivers/input/touchscreen/atmel_mxt_ts.c
 
 ATMEL SAMA5D2 ADC DRIVER
 M:	Ludovic Desroches <ludovic.desroches@microchip.com>
+M:	Eugen Hristev <eugen.hristev@microchip.com>
 L:	linux-iio@vger.kernel.org
 S:	Supported
 F:	drivers/iio/adc/at91-sama5d2_adc.c
+F:	Documentation/devicetree/bindings/iio/adc/at91-sama5d2_adc.txt
+F:	include/dt-bindings/iio/adc/at91-sama5d2_adc.h
 
 ATMEL SDMMC DRIVER
 M:	Ludovic Desroches <ludovic.desroches@microchip.com>