Move the architecture definitions into the device-specific BoardConfigs.

Newer SOC generations may have different levels of CPU feature support
(e.g. SM8450 which is ARMv9), so let's allow the individual boards to
specify their own sets of features.

Bug: 217455793
Change-Id: I6852683ad14a8fa6b0fc22f39e0c9c7823d1da2c
3 files changed