x86: Fix section conflict for numachip

A variable cannot be both __read_mostly and const. This
is a meaningless combination.

Just make it only const.

This fixes the LTO build with numachip enabled.

Signed-off-by: Andi Kleen <ak@linux.intel.com>
Link: http://lkml.kernel.org/r/1411533139-25708-1-git-send-email-andi@firstfloor.org
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

arch/x86/kernel/apic/apic_numachip.c

@@ -32,7 +32,7 @@
 
 static int numachip_system __read_mostly;
 
-static const struct apic apic_numachip __read_mostly;
+static const struct apic apic_numachip;
 
 static unsigned int get_apic_id(unsigned long x)
 {