Input: s3c2410_ts - fix build error due to ADC Kconfig rename

The name of the Kconfig symbol for the ADC has changed as a result of
application to more SoCs but the select statement has not been updated,
causing linker failures as the ADC core has not been built.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>