ANDROID: dm: do_mounts_dm: Rebase on top of 4.9

ANDROID: dm: do_mounts_dm: Rebase on top of 4.9

1. "dm: optimize use SRCU and RCU" removes the use of dm_table_put.
2. "dm: remove request-based logic from make_request_fn wrapper" necessitates
    calling dm_setup_md_queue or else the request_queue's make_request_fn
    pointer ends being unset.

[    7.711600] Internal error: Oops - bad mode: 0 [#1] PREEMPT SMP
[    7.717519] CPU: 1 PID: 1 Comm: swapper/0 Tainted: G        W       4.1.15-02273-gb057d16-dirty #33
[    7.726559] Hardware name: HiKey Development Board (DT)
[    7.731779] task: ffffffc005f8acc0 ti: ffffffc005f8c000 task.ti: ffffffc005f8c000
[    7.739257] PC is at 0x0
[    7.741787] LR is at generic_make_request+0x8c/0x108
....
[    9.082931] Call trace:
[    9.085372] [<          (null)>]           (null)
[    9.090074] [<ffffffc0003f4ac0>] submit_bio+0x98/0x1e0
[    9.095212] [<ffffffc0001e2618>] _submit_bh+0x120/0x1f0
[    9.096165] cfg80211: Calling CRDA to update world regulatory domain
[    9.106781] [<ffffffc0001e5450>] __bread_gfp+0x94/0x114
[    9.112004] [<ffffffc00024a748>] ext4_fill_super+0x18c/0x2d64
[    9.117750] [<ffffffc0001b275c>] mount_bdev+0x194/0x1c0
[    9.122973] [<ffffffc0002450dc>] ext4_mount+0x14/0x1c
[    9.128021] [<ffffffc0001b29a0>] mount_fs+0x3c/0x194
[    9.132985] [<ffffffc0001d059c>] vfs_kern_mount+0x4c/0x134
[    9.138467] [<ffffffc0001d2168>] do_mount+0x204/0xbbc
[    9.143514] [<ffffffc0001d2ec4>] SyS_mount+0x94/0xe8
[    9.148479] [<ffffffc000c54074>] mount_block_root+0x120/0x24c
[    9.154222] [<ffffffc000c543e8>] mount_root+0x110/0x12c
[    9.159443] [<ffffffc000c54574>] prepare_namespace+0x170/0x1b8
[    9.165273] [<ffffffc000c53d98>] kernel_init_freeable+0x23c/0x260
[    9.171365] [<ffffffc0009b1748>] kernel_init+0x10/0x118
[    9.176589] Code: bad PC value
[    9.179807] ---[ end trace 75e1bc52ba364d13 ]---

Bug: 27175947

Signed-off-by: Badhri Jagan Sridharan <Badhri@google.com>
Change-Id: I952d86fd1475f0825f9be1386e3497b36127abd0