ARM: mach-shmobile: early console support using earlyprintk

Add support for early console to the SH-Mobile boards.

Simply perform an early platform probe for "earlyprintk"
to trigger the early serial console code in sh-sci.c.

Signed-off-by: Magnus Damm <damm@opensource.se>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
diff --git a/arch/arm/mach-shmobile/include/mach/common.h b/arch/arm/mach-shmobile/include/mach/common.h
index a12eb4d..f5986ea 100644
--- a/arch/arm/mach-shmobile/include/mach/common.h
+++ b/arch/arm/mach-shmobile/include/mach/common.h
@@ -2,6 +2,7 @@
 #define __ARCH_MACH_COMMON_H
 
 extern struct sys_timer shmobile_timer;
+extern void shmobile_setup_console(void);
 
 extern void sh7367_init_irq(void);
 extern void sh7367_add_early_devices(void);