[CPUFREQ] Make longhaul_walk_callback() static

This patch makes the needlessly global longhaul_walk_callback() static.
Signed-off-by: Adrian Bunk <bunk@stusta.de>
Signed-off-by: Dave Jones <davej@redhat.com>

arch/i386/kernel/cpu/cpufreq/longhaul.c

@@ -524,9 +524,9 @@ static unsigned int longhaul_get(unsigned int cpu)
 	return calc_speed(longhaul_get_cpu_mult());
 }
 
-acpi_status longhaul_walk_callback(acpi_handle obj_handle,
-				  u32 nesting_level,
-				  void *context, void **return_value)
+static acpi_status longhaul_walk_callback(acpi_handle obj_handle,
+					  u32 nesting_level,
+					  void *context, void **return_value)
 {
 	struct acpi_device *d;