Add support for AMD Renoir (4000-series Ryzen CPUs).
Signed-off-by: NAlexander Monakov <amonakov@ispras.ru>
Signed-off-by: NBorislav Petkov <bp@suse.de>
Acked-by: NYazen Ghannam <yazen.ghannam@amd.com>
Link: https://lkml.kernel.org/r/20200510204842.2603-4-amonakov@ispras.ru