powerpc: Merge smp.c and smp.h

This also moves setup_cpu_maps to setup-common.c (calling it
smp_setup_cpu_maps) and uses it on both 32-bit and 64-bit.

Signed-off-by: Paul Mackerras <paulus@samba.org>
diff --git a/arch/ppc/kernel/irq.c b/arch/ppc/kernel/irq.c
index 772e428..fbb2b9f8 100644
--- a/arch/ppc/kernel/irq.c
+++ b/arch/ppc/kernel/irq.c
@@ -126,7 +126,7 @@
 			seq_puts(p, "  PowerPC             Thermal Assist (cpu temp)\n");
 		}
 #endif
-#ifdef CONFIG_SMP
+#if defined(CONFIG_SMP) && !defined(CONFIG_PPC_MERGE)
 		/* should this be per processor send/receive? */
 		seq_printf(p, "IPI (recv/sent): %10u/%u\n",
 				atomic_read(&ipi_recv), atomic_read(&ipi_sent));