conversion to bio batch completion

conversion to bio batch completion

	* changes for conversion to bio batch completion from Kent
	* fix to apply the above changes cleanly on latest mtip32xx code
	* batch bio completion changes in
		* mtip_command_cleanup()
		* mtip_timeout_function()
		* mtip_handle_tfe()

Signed-off-by: Asai Thambi S P <asamymuthupa@micron.com>
Cc: Kent Overstreet <koverstreet@google.com>
Cc: Jens Axboe <axboe@kernel.dk>
Cc: Jeff Moyer <jmoyer@redhat.com>
Cc: Benjamin LaHaise <bcrl@kvack.org>
Cc: Zach Brown <zab@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>