MIPS: Octeon: Place cnmips_cu2_setup in __init memory.

It is an early_initcall, so it should be in __init memory.
Signed-off-by: David Daney <ddaney@caviumnetworks.com>
To: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/1593/Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

arch/mips/cavium-octeon/cpu.c

@@ -41,7 +41,7 @@ static int cnmips_cu2_call(struct notifier_block *nfb, unsigned long action,
 	return NOTIFY_OK;		/* Let default notifier send signals */
 }
 
-static int cnmips_cu2_setup(void)
+static int __init cnmips_cu2_setup(void)
 {
 	return cu2_notifier(cnmips_cu2_call, 0);
 }