tree 525858d74089fa1906033dc23549dc71eb902d60
parent d83b524fcf1bf3a0fa2851591e0abf845fbdeaa3
author Patrick Williams <patrick@stwcx.xyz> 1636122408 -0500
committer Patrick Williams <patrick@stwcx.xyz> 1636567932 +0000

meta-facebook: revamp OVERRIDES

Ensure OVERRIDES are specific, MACHINE or DISTRO, rather than extending
the primary OVERRIDES variable.  Fix the order so that the variables are
ordered from least-specific to most-specific since bitbake applies
overrides in increasing order.  This makes it so that 'fb-withhost' is
applied before 'fb-compute-multihost' is applied before 'yosemitev2'.
Thus, if a recipe has a specialization for 'yosemitev2' it is used
rather than the weaker specialization for 'fb-withhost'.

Tested by checking the OVERRIDES and MACHINEOVERRIDES for Bletchley,
Tiogapass, and Yosemitev2 to verify they look correct.

```
MACHINEOVERRIDES="armv7a:aspeed:aspeed-g6:fb-nohost:bletchley"
MACHINEOVERRIDES="armv6:aspeed:aspeed-g5:fb-withhost:fb-compute:fb-compute-singlehost:tiogapass"
MACHINEOVERRIDES="armv6:aspeed:aspeed-g5:fb-withhost:fb-compute:fb-compute-multihost:yosemitev2"
```

Signed-off-by: Patrick Williams <patrick@stwcx.xyz>
Change-Id: Id5fa38de29c748e4ceafd5ef5c831b4f6434ea01