powerpc/ps3: Add __init to ps3_smp_probe

Add an __init annotation to the ps3_smp_probe() routine.
Fixes build warnings like these when
CONFIG_DEBUG_SECTION_MISMATCH=y:

 WARNING: Section mismatch in reference from the function .ps3_smp_probe()

Signed-off-by: Geoff Levand <geoff@infradead.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
diff --git a/arch/powerpc/platforms/ps3/smp.c b/arch/powerpc/platforms/ps3/smp.c
index efc1cd8..4b35166 100644
--- a/arch/powerpc/platforms/ps3/smp.c
+++ b/arch/powerpc/platforms/ps3/smp.c
@@ -57,7 +57,7 @@
 			" (%d)\n", __func__, __LINE__, cpu, msg, result);
 }
 
-static int ps3_smp_probe(void)
+static int __init ps3_smp_probe(void)
 {
 	int cpu;