conf_files: bengal: Remove MPEGH encoder/decoder from Media codec list

-Remove MPEGH decoder
-Enable OMX MPEGH codec on bengal

Change-Id: Ibfc56ee272184b861cc1d810a159df91d441715c
Signed-off-by: Chandrakant I Viraktamath <civirakt@codeaurora.org>
Signed-off-by: Govindaraj Rajagopal <grajagop@codeaurora.org>
2 files changed