POST cleanup.

- Revives POST for blackfin arch;
- Removes redundant code:
     arch/blackfin/lib/post.c
     arch/powerpc/cpu/ppc4xx/commproc.c
     arch/powerpc/cpu/mpc512x/common.c
- fixes up the post_word_{load|store} usage.

Signed-off-by: Michael Zaidman <michael.zaidman@gmail.com>
Acked-by: Detlev Zundel <dzu@denx.de>
Tested-by: Anatolij Gustschin <agust@denx.de>

List of the maintainers of the affected by patch boards:
Cc: Stephan Linz <linz@li-pro.net>
Cc: Denis Peter <d.peter@mpl.ch>
Cc: Matthias Fuchs <matthias.fuchs@esd-electronics.com>
Cc: Peter Tyser <ptyser@xes-inc.com>
Cc: Stefan Roese <sr@denx.de>
Cc: Mike Frysinger <vapier@gentoo.org>
Cc: Niklaus Giger <niklaus.giger@netstal.com>
Cc: Larry Johnson <lrj@acm.org>
Cc: Feng Kan <fkan@amcc.com>
diff --git a/include/common.h b/include/common.h
index 6a79ec2..b7193e6 100644
--- a/include/common.h
+++ b/include/common.h
@@ -585,8 +585,6 @@
 uint	dpram_base_align(uint align);
 uint	dpram_alloc(uint size);
 uint	dpram_alloc_align(uint size,uint align);
-void	post_word_store (ulong);
-ulong	post_word_load (void);
 void	bootcount_store (ulong);
 ulong	bootcount_load (void);
 #define BOOTCOUNT_MAGIC		0xB001C041
@@ -727,6 +725,9 @@
 
 #ifdef CONFIG_POST
 #define CONFIG_HAS_POST
+#ifndef CONFIG_POST_ALT_LIST
+#define CONFIG_POST_STD_LIST
+#endif
 #endif
 
 #ifdef CONFIG_INIT_CRITICAL