ring-buffer: use CONFIG_HOTPLUG_CPU not CONFIG_HOTPLUG
ring-buffer: use CONFIG_HOTPLUG_CPU not CONFIG_HOTPLUG

The hotplug code in the ring buffers is for use with CPU hotplug,
not generic hotplug.

Reported-by: Andrew Morton <5c1e68b099950c134891f0b6e179498a8ebe9cf9@linux-foundation.org>
Signed-off-by: Steven Rostedt <9d183ff83abfec5c556edaf86a280a53916a11d8@redhat.com>

TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs,KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas