[PATCH v2] cpufreq: ppc: Add missing #include <asm/smp.h>

[Geert Uytterhoeven]

If CONFIG_SMP=n, <linux/smp.h> does not include <asm/smp.h>, causing:

drivers/cpufreq/ppc-corenet-cpufreq.c: In function 'corenet_cpufreq_cpu_init':
drivers/cpufreq/ppc-corenet-cpufreq.c:173:3: error: implicit declaration of function 'get_hard_smp_processor_id' [-Werror=implicit-function-declaration]

Signed-off-by: Geert Uytterhoeven <geert+renesas at glider.be>
---
Seen with e.g. corenet64_smp_defconfig + CONFIG_CPU_FREQ=y,
CONFIG_PPC_CORENET_CPUFREQ=y, CONFIG_SMP=n

v2:
  - Add comment for #include directive, as requested by Viresh
---
 drivers/cpufreq/ppc-corenet-cpufreq.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/cpufreq/ppc-corenet-cpufreq.c b/drivers/cpufreq/ppc-corenet-cpufreq.c
index bee5df7794d33d10..7cb4b766cf948d3f 100644
--- a/drivers/cpufreq/ppc-corenet-cpufreq.c
+++ b/drivers/cpufreq/ppc-corenet-cpufreq.c
@@ -22,6 +22,8 @@
 #include <linux/smp.h>
 #include <sysdev/fsl_soc.h>
 
+#include <asm/smp.h>	/* for get_hard_smp_processor_id() in UP configs */
+
 /**
  * struct cpu_data - per CPU data struct
  * @parent: the parent node of cpu clock
-- 
1.9.1