aspeed: Move remaining config to common base layer

Move the remaining bitbake base configuration data to the common aspeed
layer.

Tested: Built and verified palmetto and witherspoon images
Change-Id: I1ff2b3dc611b7e2f1b13a4b1e4d6d3dd923a1ff6
Signed-off-by: Brad Bishop <bradleyb@fuzziesquirrel.com>
3 files changed