powerpc: Fix section mismatch warning in free_lppacas

While cross-building for PPC64 I've got bunch of

WARNING: arch/powerpc/kernel/built-in.o(.text.unlikely+0x2d2): Section
mismatch in reference from the function .free_lppacas() to the variable
.init.data:lppaca_size The function .free_lppacas() references the variable
__initdata lppaca_size. This is often because .free_lppacas lacks a __initdata
annotation or the annotation of lppaca_size is wrong.

Fix it by using proper annotation for free_lppacas. Additionally, annotate
{allocate,new}_llpcas properly.
Signed-off-by: Vladimir Murzin <murzin.v@gmail.com>
Acked-by: Michael Ellerman <michael@ellerman.id.au>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>

arch/powerpc/kernel/paca.c

@@ -46,7 +46,7 @@ struct lppaca lppaca[] = {
 static struct lppaca *extra_lppacas;
 static long __initdata lppaca_size;
 
-static void allocate_lppacas(int nr_cpus, unsigned long limit)
+static void __init allocate_lppacas(int nr_cpus, unsigned long limit)
 {
 	if (nr_cpus <= NR_LPPACAS)
 		return;
@@ -57,7 +57,7 @@ static void allocate_lppacas(int nr_cpus, unsigned long limit)
 						 PAGE_SIZE, limit));
 }
 
-static struct lppaca *new_lppaca(int cpu)
+static struct lppaca * __init new_lppaca(int cpu)
 {
 	struct lppaca *lp;
 
@@ -70,7 +70,7 @@ static struct lppaca *new_lppaca(int cpu)
 	return lp;
 }
 
-static void free_lppacas(void)
+static void __init free_lppacas(void)
 {
 	long new_size = 0, nr;