MAINTAINERS: correct file entry for AD7091R

File entry has driver/iio/adc two times. Fix the file entry

Found by ./scripts/get_maintainer.pl --self-test=patterns
Signed-off-by: Amit Dhingra <mechanicalamit@gmail.com>
Reviewed-by: Marcelo Schmitt <marcelo.schmitt1@gmail.com>
Link: https://lore.kernel.org/r/CAO=gReEUr4B+E2mQsSrncHf41f0A915SuoWgA522_2Ts-dZbSg@mail.gmail.comSigned-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

MAINTAINERS

@@ -1144,7 +1144,7 @@ L:	linux-iio@vger.kernel.org
 S:	Supported
 W:	http://ez.analog.com/community/linux-device-drivers
 F:	Documentation/devicetree/bindings/iio/adc/adi,ad7091r*
-F:	drivers/iio/adc/drivers/iio/adc/ad7091r*
+F:	drivers/iio/adc/ad7091r*
 
 ANALOG DEVICES INC AD7192 DRIVER
 M:	Alexandru Tachici <alexandru.tachici@analog.com>