post: Migrate to Kconfig

We move the existing CONFIG_POST_* functionality over to CFG_POST and
then introduce CONFIG_POST to Kconfig.

Signed-off-by: Tom Rini <trini@konsulko.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
diff --git a/post/lib_powerpc/cpu.c b/post/lib_powerpc/cpu.c
index 1d47107..77c2538 100644
--- a/post/lib_powerpc/cpu.c
+++ b/post/lib_powerpc/cpu.c
@@ -20,7 +20,7 @@
 #include <post.h>
 #include <asm/mmu.h>
 
-#if CONFIG_POST & CONFIG_SYS_POST_CPU
+#if CFG_POST & CONFIG_SYS_POST_CPU
 
 extern int cpu_post_test_cmp (void);
 extern int cpu_post_test_cmpi (void);
@@ -118,4 +118,4 @@
 	return ret;
 }
 
-#endif /* CONFIG_POST & CONFIG_SYS_POST_CPU */
+#endif /* CFG_POST & CONFIG_SYS_POST_CPU */