Bug#861898: Please backport SPCR patch for ACPI console on arm64

[Steve McIntyre <steve@einval.com>]

Source: linux
Version: 4.9.25-1
Severity: normal

Hi folks,

4.9 already includes ACPI support for arm64, which is great. There's
one driver fixup which only went into 4.10, and it would be lovely if
you could backport it for 4.9 (and hence Stretch):

https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=10879ae5f12e9cab3c4e8e9504c1aaa8a033bde7

This will make automatic console detection work on any ACPI platform
with a pl011 UART, covering lots of arm64 server platforms.

Thanks!

-- System Information:
Debian Release: 8.7
  APT prefers stable-updates
  APT policy: (500, 'stable-updates'), (500, 'stable')
Architecture: amd64 (x86_64)
Foreign Architectures: i386

Kernel: Linux 4.9.0-0.bpo.1-amd64 (SMP w/4 CPU cores)
Locale: LANG=en_GB.UTF-8, LC_CTYPE=en_GB.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)