What I can think of is tracking all the patches that integrate the TI ADC driver between PSP versions 04.06.00.08 and 04.06.00.09 and applying them to your tree.
The arago linux git repo can be found here: http://arago-project.org/git/projects/?p=linux-am33x.git;a=summary
There are tags for PSP versions 04.06.00.08 and 04.06.00.09.
Best regards,
Miroslav