cpumask: Remove IA64 definition of total_cpus now it's in core code

Impact: fix IA64 compile

Fortunately, they have exactly the same semantics.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
diff --git a/arch/ia64/kernel/acpi.c b/arch/ia64/kernel/acpi.c
index 54ae373..0553648 100644
--- a/arch/ia64/kernel/acpi.c
+++ b/arch/ia64/kernel/acpi.c
@@ -202,7 +202,6 @@
                             Boot-time Table Parsing
    -------------------------------------------------------------------------- */
 
-static int total_cpus __initdata;
 static int available_cpus __initdata;
 struct acpi_table_madt *acpi_madt __initdata;
 static u8 has_8259;