refactor(qemu): move CPU definitions into one place

Keep list of supported cpu cores in one place for both platforms.
qemu_sbsa does not handle some of them but with 256MB firmware space it
does not matter.

Change-Id: I5b8f7d18dc903e86e0cc7babbc2fb3f26a1bfdfa
Signed-off-by: Marcin Juszkiewicz <marcin.juszkiewicz@linaro.org>
3 files changed