arm: make psci_smp_available() depend on SMP + PSCI as the makefile does

From: Sebastian Andrzej Siewior <[email protected]>

with CONFIG_ARM_PSCI=y, CONFIG_SMP=n and CONFIG_ARCH_TEGRA_124_SOC=y I end up with:

|arch/arm/mach-tegra/built-in.o: In function `tegra114_cpuidle_init':
|arch/arm/mach-tegra/cpuidle-tegra114.c:93: undefined reference to `psci_smp_available'
|Makefile:927: recipe for target 'vmlinux' failed

during build testing.

---
 arch/arm/include/asm/psci.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

index 68ee3ce17b82..ff956f4d4307 100644
@@ -16,7 +16,7 @@
 
 extern struct smp_operations psci_smp_ops;
 
-#ifdef CONFIG_ARM_PSCI
+#if defined(CONFIG_ARM_PSCI) && defined(CONFIG_SMP)
 bool psci_smp_available(void);
 #else
 static inline bool psci_smp_available(void) { return false; }

2.6.0

Jan Kiszka sent out an equivalent patch back in May, but it seems like discussion stalled on that. He resent a few days ago:

	http://patchwork.ozlabs.org/patch/521597/

Let me see if I can get the original discussion resumed. I'll add you in the loop.

Thierry
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