powerpc: Add printk companion for ppc_md.progress

This patch adds a printk companion to replace the udbg progress function
when initmem is freed.

Suggested-by: Milton Miller <miltonm@bga.com>
Suggested-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Dave Carroll <dcarroll@astekcorp.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>

arch/powerpc/include/asm/setup.h

@@ -3,4 +3,6 @@
 
 #include <asm-generic/setup.h>
 
+extern void ppc_printk_progress(char *s, unsigned short hex);
+
 #endif	/* _ASM_POWERPC_SETUP_H */

arch/powerpc/kernel/setup-common.c

@@ -704,6 +704,11 @@ static int powerpc_debugfs_init(void)
 arch_initcall(powerpc_debugfs_init);
 #endif
 
+void ppc_printk_progress(char *s, unsigned short hex)
+{
+	pr_info("%s\n", s);
+}
+
 static int ppc_dflt_bus_notify(struct notifier_block *nb,
 				unsigned long action, void *data)
 {

arch/powerpc/mm/mem.c

@@ -387,7 +387,7 @@ void free_initmem(void)
 {
 	unsigned long addr;
 
-	ppc_md.progress = NULL;
+	ppc_md.progress = ppc_printk_progress;
 
 	addr = (unsigned long)__init_begin;
 	for (; addr < (unsigned long)__init_end; addr += PAGE_SIZE) {