Bad file pattern in MAINTAINERS section 'ANALOG DEVICES INC AD7606 DRIVER'

[Joe Perches]

A file pattern line in this section of the MAINTAINERS file in linux-next
does not have a match in the linux source files.

This could occur because a matching filename was never added, was deleted
or renamed in some other commit.

The commits that added and if found renamed or removed the file pattern
are shown below.

Please fix this defect appropriately.

1: ---------------------------------------------------------------------------

linux-next MAINTAINERS section:

	865	ANALOG DEVICES INC AD7606 DRIVER
	866	M:	Stefan Popa <stefan.popa@xxxxxxxxxx>
	867	L:	linux-iio@xxxxxxxxxxxxxxx
	868	W:	http://ez.analog.com/community/linux-device-drivers
	869	S:	Supported
	870	F:	drivers/iio/adc/ad7606.c
-->	871	F:	Documentation/devicetree/bindings/iio/adc/ad7606.txt

2: ---------------------------------------------------------------------------

The most recent commit that added or modified file pattern 'Documentation/devicetree/bindings/iio/adc/ad7606.txt':

commit 6e33a125df66664a09cd518a2e1dd63b4ccddef8
Author: Stefan Popa <stefan.popa@xxxxxxxxxx>
Date:   Mon Dec 17 14:23:40 2018 +0200

    dt-bindings: iio: adc: Add docs for AD7606 ADC
    
    Document support for AD7606 Analog to Digital Converter.
    
    Signed-off-by: Stefan Popa <stefan.popa@xxxxxxxxxx>
    Reviewed-by: Rob Herring <robh@xxxxxxxxxx>
    Signed-off-by: Jonathan Cameron <Jonathan.Cameron@xxxxxxxxxx>

 .../devicetree/bindings/iio/adc/adi,ad7606.txt     | 65 ++++++++++++++++++++++
 MAINTAINERS                                        |  1 +
 2 files changed, 66 insertions(+)

3: ---------------------------------------------------------------------------

No commit with file pattern 'Documentation/devicetree/bindings/iio/adc/ad7606.txt' was found