parisc: remove gratuitous cpu_online_map declaration.

This is defined in linux/cpumask.h (included in this file already),
and this is now defined differently.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Cc: linux-parisc@vger.kernel.org
diff --git a/arch/parisc/include/asm/smp.h b/arch/parisc/include/asm/smp.h
index 409e698..6ef4b78 100644
--- a/arch/parisc/include/asm/smp.h
+++ b/arch/parisc/include/asm/smp.h
@@ -16,8 +16,6 @@
 #include <linux/cpumask.h>
 typedef unsigned long address_t;
 
-extern cpumask_t cpu_online_map;
-
 
 /*
  *	Private routines/data