ANDROID: scsi: ufs: add complete init vendor hook

Currently the core UFS driver does not have a vops to notify when the
device is operational. This commit introduces a hook, which serves to
notify device completing initialization and is ready to accept I/O.

This is required by the FIPS140-2 [1] self integrity test of inline
encryption engine, which must run whenever the host controller is reset.
The code requires sleeping while waiting for I/O to complete and allocating
some memory dynamically, which requires the vendor hook to be restricted.

[1] https://csrc.nist.gov/publications/detail/fips/140/2/final



Bug: 185809932
Change-Id: I6f476f9c2e2b50574d2898c3f1ef6b648d92df24
(cherry picked from commit e774e4ec)
Signed-off-by: Konstantin Vyshetsky <vkon@google.com>