Add USAGE_OEM

Allow OEMs to pass data from other HW blocks via internal
extension.

Change-Id: I78c19f5eec462aff7d8a5408f2f16cfc9b78c036
diff --git a/rsDriverLoader.cpp b/rsDriverLoader.cpp
index 528af0f..2bc53b6 100644
--- a/rsDriverLoader.cpp
+++ b/rsDriverLoader.cpp
@@ -82,6 +82,7 @@
     ret &= fn(RS_HAL_SCRIPT_UPDATE_CACHED_OBJECT, (void **)&rsc->mHal.funcs.script.updateCachedObject);
 
     ret &= fn(RS_HAL_ALLOCATION_INIT, (void **)&rsc->mHal.funcs.allocation.init);
+    ret &= fn(RS_HAL_ALLOCATION_INIT_OEM, (void **)&rsc->mHal.funcs.allocation.initOem);
     ret &= fn(RS_HAL_ALLOCATION_INIT_ADAPTER, (void **)&rsc->mHal.funcs.allocation.initAdapter);
     ret &= fn(RS_HAL_ALLOCATION_DESTROY, (void **)&rsc->mHal.funcs.allocation.destroy);
     ret &= fn(RS_HAL_ALLOCATION_GET_GRALLOC_BITS, (void **)&rsc->mHal.funcs.allocation.grallocBits);