powerpc: Fix build for 32-bit SMP configs

attr_smt_snooze_delay is only defined for CONFIG_PPC64, so protect the
attribute removal with the same condition.  This fixes this build error
on 32-bit SMP configurations:

/data/home/miltonm/next.git/arch/powerpc/kernel/sysfs.c: In function ‘unregister_cpu_online’:
/data/home/miltonm/next.git/arch/powerpc/kernel/sysfs.c:722: error: ‘attr_smt_snooze_delay’ undeclared (first use in this function)
/data/home/miltonm/next.git/arch/powerpc/kernel/sysfs.c:722: error: (Each undeclared identifier is reported only once
/data/home/miltonm/next.git/arch/powerpc/kernel/sysfs.c:722: error: for each function it appears in.)

Signed-off-by: Paul Mackerras <paulus@samba.org>

1 files changed, 2 insertions, 0 deletions

diff --git a/arch/powerpc/kernel/sysfs.c b/arch/powerpc/kernel/sysfs.c
index 86a2ffccef25..20885a38237a 100644
--- a/arch/powerpc/kernel/sysfs.c
+++ b/arch/powerpc/kernel/sysfs.c
@@ -717,9 +717,11 @@ static void unregister_cpu_online(unsigned int cpu)
 
         BUG_ON(!c->hotpluggable);
 
+#ifdef CONFIG_PPC64
         if (!firmware_has_feature(FW_FEATURE_ISERIES) &&
                         cpu_has_feature(CPU_FTR_SMT))
                 sysdev_remove_file(s, &attr_smt_snooze_delay);
+#endif
 
         /* PMC stuff */
         switch (cur_cpu_spec->pmc_type) {