Revert "cpu: add generic support for CPU feature based module autoloading"

This reverts commit 9025d688.

A patch was accidentally applied into android-3.18 even though it was
already merged in 3.15 earlier, and partly reverted later by commit
2b9c1f03 ("x86: align x86 arch with generic CPU modalias handling")

Applying it again resulted in an inconsistent state of the Kconfig
variables that led to the feature being disabled on all architectures,
as shown by this warning:

drivers/base/cpu.c:317:12: warning: 'cpu_uevent' defined but not used [-Wunused-function]

This reverts the incorrectly applied patch.

Fixes: 9025d688 ("cpu: add generic support for CPU feature based module autoloading")
Cc: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>