x86/cpu/bugs: Convert to new matching macros

The new macro set has a consistent namespace and uses C99 initializers
instead of the grufty C89 ones.

The local wrappers have to stay as they are tailored to tame the hardware
vulnerability mess.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Borislav Petkov <bp@suse.de>
Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Link: https://lkml.kernel.org/r/20200320131508.934926587@linutronix.de