Merge tag 'v4.14.87-rt49-rebase' of...

Merge tag 'v4.14.87-rt49-rebase' of git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-stable-rt

 into rpi-4.14.y-rt

Linux 4.14.87-rt49 REBASE

Signed-off-by: Tiejun Chen <tiejun.china@gmail.com>