Blackfin: allow boards to register early devices

Signed-off-by: Sonic Zhang <sonic.zhang@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>

arch/blackfin/kernel/setup.c

@@ -792,10 +792,17 @@ static inline int __init get_mem_size(void)
 	BUG();
 }
 
+__attribute__((weak))
+void __init native_machine_early_platform_add_devices(void)
+{
+}
+
 void __init setup_arch(char **cmdline_p)
 {
 	unsigned long sclk, cclk;
 
+	native_machine_early_platform_add_devices();
+
 	enable_shadow_console();
 
 	/* Check to make sure we are running on the right processor */