The addition of kmod-input-touchscreen-ads7846 enabled
INPUT_TOUCHSCREEN, which exposes several other symbols on various
targets. Add those symbols to the generic kernel configs to fix build.
Fixes: 77a54bbf13 ("kernel: add kmod-input-touchscreen-ads7846")
Reported-by: Hannu Nyman <hannu.nyman@iki.fi>
Signed-off-by: Stijn Tintel <stijn@linux-ipv6.be>