powerpc/xive: Fix section mismatch warnings

Both xive_core_init() and xive_native_init() are called from and call
__init routines, so they should also be __init.

Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
diff --git a/arch/powerpc/sysdev/xive/native.c b/arch/powerpc/sysdev/xive/native.c
index 0f95476b..1dbf782 100644
--- a/arch/powerpc/sysdev/xive/native.c
+++ b/arch/powerpc/sysdev/xive/native.c
@@ -531,7 +531,7 @@ u32 xive_native_default_eq_shift(void)
 }
 EXPORT_SYMBOL_GPL(xive_native_default_eq_shift);
 
-bool xive_native_init(void)
+bool __init xive_native_init(void)
 {
 	struct device_node *np;
 	struct resource r;