MetadataCrypt: remove unnecessary retry loop

As per the discussion at http://aosp/1456266, the retry loop in
create_crypto_blk_dev() doesn't appear to be needed.  Remove it.

For now don't bother removing the same retry loop in cryptfs.cpp, since
the FDE code isn't really being updated anymore and eventually will be
removed entirely.

Change-Id: Iba0b046f9cdd9723ea1a2ae70f4d4aed4355b97b
1 file changed