According to section 22.4.1.1 of the TRM the McASP REV register should read 0x44300A02. On my device, AM3358BZCZA100, I am seeing 0x44307B02.
I believe this is harmless. However my assumption is that the IP block has been modified since the McASP section of the TRM was written. Is there any errata associated with this change?