Comment # 8 on bug 71983 from Michel Dänzer

Thanks for testing! Fixed in Git:

commit c8a437f4c76527b3c8385699ccee07f35fe3f166
Author: Michel Dänzer <michel.daenzer@amd.com>
Date:   Tue Nov 26 18:16:03 2013 +0900

    radeon: Update unaligned offset for 2D->1D tiling transition on SI