To get the FSL amrdecoder building and running on imx53 in 11.09 BSP:
TIP: During debug for creation of these patches -> On the target, I had to make sure I had all the amr decoder libraries present, or it just wouldn't work. I narrowed those down by deleting "rm /root/.gstreamer-0.10/registry.arm.bin" and rerunning gst-inspect to rescan the plugins. With GST_DEBUG=3 I could see what libraries were missing and copied them over. But once everything was in place, it just worked.
gst-launch playbin2 uri=file:////media/sd/media_file_with_amr_audio_encoding.3gp
Attached are the new .spec files and patch files to get this to work.