x86/topology: Define topology_die_id()

topology_die_id(cpu) is a simple macro for use inside the kernel to get the
die_id associated with the given cpu.

Signed-off-by: Len Brown <len.brown@intel.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Ingo Molnar <mingo@kernel.org>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lkml.kernel.org/r/6463bc422b1b05445a502dc505c1d7c6756bda6a.1557769318.git.len.brown@intel.com