Bionic update to v4.15.1 stable release

SRU Justification

    Impact:
       The upstream process for stable tree updates is quite similar
       in scope to the Ubuntu SRU process, e.g., each patch has to
       demonstrably fix a bug, and each patch is vetted by upstream
       by originating either directly from a mainline/stable Linux tree or
       a minimally backported form of that patch. The v4.15.1 upstream stable
       patch set is now available. It should be included in the Ubuntu
       kernel as well.

       git://git.kernel.org/

    TEST CASE: TBD

       The following patches from the v4.15.1 stable release shall be applied:

Bluetooth: hci_serdev: Init hci_uart proto_lock to avoid oops
tools/gpio: Fix build error with musl libc
gpio: stmpe: i2c transfer are forbiden in atomic context
gpio: Fix kernel stack leak to userspace
ALSA: hda - Reduce the suspend time consumption for ALC256
crypto: ecdh - fix typo in KPP dependency of CRYPTO_ECDH
crypto: aesni - handle zero length dst buffer
crypto: aesni - fix typo in generic_gcmaes_decrypt
crypto: aesni - add wrapper for generic gcm(aes)
crypto: aesni - Fix out-of-bounds access of the data buffer in generic-gcm-aesni
crypto: aesni - Fix out-of-bounds access of the AAD buffer in generic-gcm-aesni
crypto: inside-secure - fix hash when length is a multiple of a block
crypto: inside-secure - avoid unmapping DMA memory that was not mapped
crypto: sha3-generic - fixes for alignment and big endian operation
crypto: af_alg - whitelist mask and type
HID: wacom: EKR: ensure devres groups at higher indexes are released
HID: wacom: Fix reporting of touch toggle (WACOM_HID_WD_MUTE_DEVICE) events
power: reset: zx-reboot: add missing MODULE_DESCRIPTION/AUTHOR/LICENSE
gpio: iop: add missing MODULE_DESCRIPTION/AUTHOR/LICENSE
gpio: ath79: add missing MODULE_DESCRIPTION/LICENSE
mtd: nand: denali_pci: add missing MODULE_DESCRIPTION/AUTHOR/LICENSE
igb: Free IRQs when device is hotplugged
ima/policy: fix parsing of fsuuid
scsi: aacraid: Fix udev inquiry race condition
scsi: aacraid: Fix hang in kdump
scsi: storvsc: missing error code in storvsc_probe()
staging: lustre: separate a connection destroy from free struct kib_conn
staging: ccree: NULLify backup_info when unused
staging: ccree: fix fips event irq handling build
tty: fix data race between tty_init_dev and flush of buf
usb: option: Add support for FS040U modem
USB: serial: pl2303: new device id for Chilitag
USB: cdc-acm: Do not log urb submission errors on disconnect
CDC-ACM: apply quirk for card reader
USB: serial: io_edgeport: fix possible sleep-in-atomic
usbip: prevent bind loops on devices attached to vhci_hcd
usbip: list: don't list devices attached to vhci_hcd
USB: serial: simple: add Motorola Tetra driver
usb: f_fs: Prevent gadget unbind if it is already unbound
usb: uas: unconditionally bring back host after reset
usb/gadget: Fix "high bandwidth" check in usb_gadget_ep_match_desc()
ANDROID: binder: remove waitqueue when thread exits.
android: binder: use VM_ALLOC to get vm area
mei: me: allow runtime pm for platform with D0i3
serial: 8250_of: fix return code when probe function fails to get reset
serial: 8250_uniphier: fix error return code in uniphier_uart_probe()
serial: 8250_dw: Revert "Improve clock rate setting"
serial: imx: Only wakeup via RTSDEN bit if the system has RTS/CTS
spi: imx: do not access registers while clocks disabled
iio: adc: stm32: fix scan of multiple channels with DMA
iio: chemical: ccs811: Fix output of IIO_CONCENTRATION channels
test_firmware: fix missing unlock on error in config_num_requests_store()
Input: synaptics-rmi4 - unmask F03 interrupts when port is opened
Input: synaptics-rmi4 - do not delete interrupt memory too early
x86/efi: Clarify that reset attack mitigation needs appropriate userspace
Linux 4.15.1