iio:adc: Fix trivial typo

"an" should be "and".

Signed-off-by: Jonathan Cameron <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]

drivers/iio/adc/Kconfig

···
 	  module will be called ad7298.
 
 config AD7476
-	tristate "Analog Devices AD7476 1-channel ADCs driver and other similar devices from AD an TI"
+	tristate "Analog Devices AD7476 1-channel ADCs driver and other similar devices from AD and TI"
 	depends on SPI
 	select IIO_BUFFER
 	select IIO_TRIGGERED_BUFFER