[ARM] Export smp_call_function()

smp_call_function() will be used with the MP/core oprofile support
patch.  Export it as _GPL.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
diff --git a/arch/arm/kernel/smp.c b/arch/arm/kernel/smp.c
index a07d202..070bcb7 100644
--- a/arch/arm/kernel/smp.c
+++ b/arch/arm/kernel/smp.c
@@ -451,6 +451,7 @@
 	return smp_call_function_on_cpu(func, info, retry, wait,
 					cpu_online_map);
 }
+EXPORT_SYMBOL_GPL(smp_call_function);
 
 void show_ipi_list(struct seq_file *p)
 {