APFv7: remove spurious assert in LD{B,H,W}{,X} am: 41d03e4542

Original change: https://android-review.googlesource.com/c/platform/hardware/google/apf/+/3490177

Change-Id: I45af8598e83b6959dc9b864004ff9fdd8156da31
Signed-off-by: Automerger Merge Worker <[email protected]>