x86/cpufeatures: Add FEATURE_ZEN

x86/cpufeatures: Add FEATURE_ZEN

commit d1035d971829dcf80e8686ccde26f94b0a069472 upstream.

Add a ZEN feature bit so family-dependent static_cpu_has() optimizations
can be built for ZEN.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Borislav Petkov <bp@suse.de>
Reviewed-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Signed-off-by: David Woodhouse <dwmw@amazon.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
[bwh: Backported to 3.16:
 - Use the next available bit number in CPU feature word 7
 - Adjust filename, context]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>