MIPS: parse chosen node on boot

Call early_init_devtree from inside __dt_setup_arch to allow parsing of the
chosen node.
Signed-off-by: John Crispin <blogic@openwrt.org>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/3718/Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

arch/mips/kernel/prom.c

@@ -105,4 +105,6 @@ void __init __dt_setup_arch(struct boot_param_header *bph)
 	}
 
 	initial_boot_params = bph;
+
+	early_init_devtree(initial_boot_params);
 }