x86/CPU: Rename intel_cacheinfo.c to cacheinfo.c

x86/CPU: Rename intel_cacheinfo.c to cacheinfo.c

Since this file contains general cache-related information for x86,
rename the file to a more generic name.

Signed-off-by: Borislav Petkov <bp@suse.de>
Signed-off-by: Suravee Suthikulpanit <suravee.suthikulpanit@amd.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/1524864877-111962-4-git-send-email-suravee.suthikulpanit@amd.com
CVE-2018-3620
CVE-2018-3646

(cherry picked from commit 1d200c078d0e3e49e2995b9d25fef8926d491f4f)
Signed-off-by: Tyler Hicks <tyhicks@canonical.com>
Signed-off-by: Stefan Bader <stefan.bader@canonical.com>