iio: frequency: adf4377: add missing select REMAP_SPI in Kconfig

This driver makes use of regmap_spi, but does not select the required
module.
Add the missing 'select REGMAP_SPI'.

Fixes: eda549e ("iio: frequency: adf4377: add support for ADF4377")
Signed-off-by: Javier Carrasco <[email protected]>
Link: https://patch.msgid.link/[email protected]
Cc: <[email protected]>
Signed-off-by: Jonathan Cameron <[email protected]>

Author: javiercarrascocruz

drivers/iio/frequency/Kconfig

@@ -53,6 +53,7 @@ config ADF4371
 config ADF4377
 	tristate "Analog Devices ADF4377 Microwave Wideband Synthesizer"
 	depends on SPI && COMMON_CLK
+	select REGMAP_SPI
 	help
 	  Say yes here to build support for Analog Devices ADF4377 Microwave
 	  Wideband Synthesizer.