msm: camera: Fix 64bit DMI tbl write len check

The hi table offset check during 64 bit DMI table writing
is off by 1 4-byte word, causing valid reads or writes to fail
if DMI payload end is the same as the command buffer end.

Change-Id: I7d193f36dfa1f10d92f0447524803dd749fa6663
Signed-off-by: Senthil <skrajago@codeaurora.org>