OMAP: l3: don't bug out on app errors

This "Functional Inband error" for "Agent: sDMA Rd IA" (bit19 of
L3_SI_FLAG_STATUS_0) happens randomly while both recording+playing is
active, perhaps when it's being paused/resumed?

Linux-SWAT reported that system keeps functioning if the error is
ignored, and Neelix reported recording breaks until reinitialized,
but this is still much better than bringing the system down.