powerpc: Various UP build fixes

Mostly this involves adding #include <asm/smp.h>, since that defines
things like boot_cpuid[_phys] and [gs]et_hard_smp_processor_id, which
are SMP-related but still needed on UP.  This incorporates fixes
posted by Olof Johansson and Heikki Lindholm.

Signed-off-by: Paul Mackerras <paulus@samba.org>
diff --git a/arch/powerpc/kernel/time.c b/arch/powerpc/kernel/time.c
index 6996a59..1c7ea5e 100644
--- a/arch/powerpc/kernel/time.c
+++ b/arch/powerpc/kernel/time.c
@@ -61,6 +61,7 @@
 #include <asm/prom.h>
 #include <asm/irq.h>
 #include <asm/div64.h>
+#include <asm/smp.h>
 #ifdef CONFIG_PPC64
 #include <asm/systemcfg.h>
 #include <asm/firmware.h>
@@ -118,10 +119,6 @@
 unsigned long ppc_proc_freq;
 unsigned long ppc_tb_freq;
 
-#ifdef CONFIG_PPC32	/* XXX for now */
-#define boot_cpuid	0
-#endif
-
 u64 tb_last_jiffy __cacheline_aligned_in_smp;
 unsigned long tb_last_stamp;