Disable most platform drivers, SPI and I2C drivers at the top level.
Platform drivers should be selected by architecture and flavour
configurations, and generally are. SPI and I2C devices aren't easily
detectable and their drivers aren't auto-loaded, so again they should
usually be selected in specific configuration files and probed
according to board code or FDTs.
As exceptions, I2C hwmon devices may be probed by lm-sensors and many
media tuners include I2C devices which are probed with the help of the
higher-level device driver. I've tried to be conservative and also
left I2C iio, input, leds and misc devices alone for now.
Disable the regulator subsystem at the top level as only some
architectures will need it.
Disable MTD_NAND_PLATFORM, PDA_POWER and FB_S1D13XXX on x86, as these
don't appear likely to be used on any x86 system that could run our
generic kernel images.
svn path=/dists/trunk/linux/; revision=20556
1b743d674d