Revert "scsi: core: Rename scsi_mq_done() into scsi_done() and export it"

This reverts commit d2746cdf which is
commit a710eacb upstream.

It breaks the Android KABI and is not needed at this time for any
Android-relevant systems.

Bug: 161946584
Change-Id: I7657431a5d17cb9f4155b223eeec57ec0e440e7a
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>