this patch fixes following sparse warning:
fdt.c:765:12: warning: symbol 'early_init_dt_scan_chosen_serial' was not declared. Should it be static?
Signed-off-by: Lad, Prabhakar <prabhakar.csengg@gmail.com>
Signed-off-by: Rob Herring <robh@kernel.org>
 #ifdef CONFIG_SERIAL_EARLYCON
 extern struct of_device_id __earlycon_of_table[];
 
-int __init early_init_dt_scan_chosen_serial(void)
+static int __init early_init_dt_scan_chosen_serial(void)
 {
        int offset;
        const char *p;