linux-yocto/4.12: warning: drm/i915/cfl: Coffee Lake works on Kaby Lake PCH

linux-yocto/4.12: warning: drm/i915/cfl: Coffee Lake works on Kaby Lake PCH

Integrating the following warning backport:

    commit eb371933cf4d3495d0899880b2e0e252ce9db517 upstream.

    Coffee Lake CPU on Kaby Lake PCH is possible.
    It does exist, and it does work.

    The only missed case was this warning here noticed
    by Wendy who could get one system with this configuration
    and reported the issue for us:

    Hardware Configuration
    Board ID KBL S DDR4 UDIMM EV CRB
    Processor    Intel® Processor code named Coffee Lake S, (6+2), 6 cores 12 threads, GT2, A0 (Internal) (QNJ4)

    [ 3.220585] WARNING: CPU: 10 PID: 206 at drivers/gpu/drm/i915/i915_drv.c:340 i915_driver_load+0x1210/0x1660 [i915]
    [ 3.221312] Modules linked in: hid_generic usbhid i915 i2c_algo_bit drm_kms_helper e1000e syscopyarea sysfillrect sysimgblt nvme fb_sys_fops ptp ahci i2c_hid drm pps_core nvme_core libahci wmi hid video
    [ 3.222050] CPU: 10 PID: 206 Comm: systemd-udevd Not tainted 4.13.0-rc5-intel-next+ #1
    [ 3.222706] Hardware name: Intel Corporation Kabylake Client platform/KBL S DDR4 UDIMM EV CRB, BIOS KBLSE2R1.R00.X089.P00.1705051000 05/05/2017

    Cc: Wendy Wang <wendy.wang@intel.com>
    Cc: Dhinakaran Pandiyan <dhinakaran.pandiyan@intel.com>
    Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
    Reviewed-by: Dhinakaran Pandiyan <dhinakaran.pandiyan@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20170821235056.9015-1-rodrigo.vivi@intel.com
    Signed-off-by: Liwei Song <liwei.song@windriver.com>
(From OE-Core rev: 62acf087dca83ff094b1c0300b5752978807ca17)

Signed-off-by: Bruce Ashfield <bruce.ashfield@windriver.com>
Signed-off-by: Ross Burton <ross.burton@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>