sh: Add plat_early_device_setup()

Add a plat_early_device_setup() function to allow
processor-specific code to register Early Platform Data.
Signed-off-by: Magnus Damm <damm@igel.co.jp>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>

arch/sh/include/asm/device.h

@@ -10,3 +10,5 @@ struct platform_device;
 int platform_resource_setup_memory(struct platform_device *pdev,
 				   char *name, unsigned long memsize);
 
+void plat_early_device_setup(void);
+

arch/sh/kernel/setup.c

@@ -29,6 +29,7 @@
 #include <linux/mmzone.h>
 #include <linux/clk.h>
 #include <linux/delay.h>
+#include <linux/platform_device.h>
 #include <asm/uaccess.h>
 #include <asm/io.h>
 #include <asm/page.h>
@@ -328,6 +329,10 @@ static int __init parse_elfcorehdr(char *arg)
 early_param("elfcorehdr", parse_elfcorehdr);
 #endif
 
+void __init __attribute__ ((weak)) plat_early_device_setup(void)
+{
+}
+
 void __init setup_arch(char **cmdline_p)
 {
 	enable_mmu();
@@ -381,6 +386,8 @@ void __init setup_arch(char **cmdline_p)
 
 	parse_early_param();
 
+	plat_early_device_setup();
+
 	sh_mv_setup();
 
 	/*