Revert "atv_base.mk: switch to new H264 and MPEG2 software codecs"

clang builds fail on the dependent libraries

This reverts commit 9f2ef6b342d422f04dc617b503b1835f3b4ef6fb.

Change-Id: Icba7816d3c78b3dcca5368881b25fab36202f028
1 file changed