Revert "rename heap_mask -> heap_id_mask"

Make the code compatible with the ion interface in the old FP2 kernel.

The reverted commit does not appear in the history here, but refers to a
commit in the original history in device/qcom/common.

This reverts commit 6aa3ad41820da4ded859ba6f0c0efa3ba37c11d8.

Issue: FP2P-164
Change-Id: I8873dde8c61cadee2f9a42c5c4036fe376b03185
diff --git a/oem-recovery/dec.cpp b/oem-recovery/dec.cpp
index 9d2fd90..758f789 100644
--- a/oem-recovery/dec.cpp
+++ b/oem-recovery/dec.cpp
@@ -123,7 +123,7 @@
     alloc_data.align = 4096;
 
     alloc_data.flags = 0;
-    alloc_data.heap_id_mask = ION_HEAP(heap);
+    alloc_data.heap_mask = ION_HEAP(heap);
 
     /* Set the buffers to be uncached */
     alloc_data.flags = 0;