iio: adc: rockchip_saradc: Allow compile-testing with !ARM

There seems no reason to allow for compile-testing on ARM only, so
remove this restriction.

Build-tested with allyesconfig on x86.
Signed-off-by: Alex Dewar <alex.dewar90@gmail.com>
Reviewed-by: Heiko Stuebner <heiko@sntech.de>
Link: https://lore.kernel.org/r/20200904170416.16061-1-alex.dewar90@gmail.comSigned-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

drivers/iio/adc/Kconfig

@@ -863,7 +863,7 @@ config RN5T618_ADC
 
 config ROCKCHIP_SARADC
 	tristate "Rockchip SARADC driver"
-	depends on ARCH_ROCKCHIP || (ARM && COMPILE_TEST)
+	depends on ARCH_ROCKCHIP || COMPILE_TEST
 	depends on RESET_CONTROLLER
 	help
 	  Say yes here to build support for the SARADC found in SoCs from