[POWERPC] free_property() must not be __init

This fixes the following section mismatch:

<-- snip -->

...
WARNING: vmlinux.o(.text+0x55648): Section mismatch in reference from the function .free_node() to the function .init.text:.free_property()
...

<-- snip -->

Signed-off-by: Adrian Bunk <[e-mail]>
Acked-by: Stephen Rothwell <[e-mail]>
Signed-off-by: Paul Mackerras <[e-mail]>

arch/powerpc/platforms/iseries/vio.c

···
 	return np;
 }
 
-static void __init free_property(struct property *np)
+static void free_property(struct property *np)
 {
 	kfree(np);
 }