arm64: Add scheduler multicore and SMT Kconfig options

Enable additional use of additional scheduler features with the topology
information.

Change-Id: Ie4d47776e8f21ce4873d8f10fcb3cfd7e2149b67
Reported-by: Hanjun Guo <hanjun.guo@linaro.org>
Signed-off-by: Mark Brown <broonie@linaro.org>
Git-commit: d474d10a1a827e0b3402943a62a97d95c0eabf8d
Git-repo: git://git.linaro.org/kernel/linux-linaro-stable.git


Signed-off-by: Matt Wagantall <mattw@codeaurora.org>