msm7x30: Enable RefBase compatibility symbols

* Allows our ancient camera libs to load

Change-Id: I5b0254089dd1e9e34662516e56c0b7abd2e71958
Revert "msm7x30: Use cortex-a8 cpu variant"

* Use scorpion variant again

This reverts commit ca3f5964a69e20b7e5e03e4ffc68fe33fba99587.