Revert "Pin vendor/sprd/open-source to revision 5bf05756148495fc6d72e7889a39a9f189257154 to work around bustage from rev ba98fdc67afe524a6efd6392c3fb174ccdf67d22."

This reverts commit 48c53b10133dfa58563388dc0ecf5b07cb5d04ec.