powerpc: Fix compile error with paca code on ppc64e

arch/powerpc/kernel/paca.c: In function 'allocate_lppacas':
arch/powerpc/kernel/paca.c:111:1: error: parameter name omitted
arch/powerpc/kernel/paca.c:111:1: error: parameter name omitted

Signed-off-by: Kumar Gala <galak@kernel.crashing.org>

arch/powerpc/kernel/paca.c

@@ -108,7 +108,7 @@ static void free_lppacas(void)
 
 #else
 
-static inline void allocate_lppacas(int, unsigned long) { }
+static inline void allocate_lppacas(int nr_cpus, unsigned long limit) { }
 static inline void free_lppacas(void) { }
 
 #endif /* CONFIG_PPC_BOOK3S */