libvpx has always supported the VPX_ prefixed versions of these defines.
The unprefixed versions have been removed in the most recent release.
9cdaa3d72e
BUG=23452792
Change-Id: I8a656f2262f117d7a95271f45100b8c6fd0a470f
(cherry picked from commit 8ac1a9f6d00193ab38feefed25cd4bcdbd7f045e)