Fix in Chroma SAO for non-multiple of 8 height

A register was not loaded correctly which was resulting in a crash
for a certain combination of availability flags and block height

Bug: 32873375
Test: Tested manually for the clip associated with the bug
Change-Id: I6e0969a1e51c8149853bae226b527411b45ec370
(cherry picked from commit 68215fd9ed309d1f1cc204e96bd788f5c865525c)
2 files changed