post: Move CONFIG_SYS_POST to CFG_SYS_POST

Migrate the rest of the CONFIG_SYS_POST macros over to CFG_SYS_POST
namespace.

Signed-off-by: Tom Rini <trini@konsulko.com>
diff --git a/post/drivers/rtc.c b/post/drivers/rtc.c
index cfed56b..cc7a498 100644
--- a/post/drivers/rtc.c
+++ b/post/drivers/rtc.c
@@ -26,7 +26,7 @@
 #include <post.h>
 #include <rtc.h>
 
-#if CFG_POST & CONFIG_SYS_POST_RTC
+#if CFG_POST & CFG_SYS_POST_RTC
 
 static int rtc_post_skip (ulong * diff)
 {
@@ -189,4 +189,4 @@
 	return 0;
 }
 
-#endif /* CFG_POST & CONFIG_SYS_POST_RTC */
+#endif /* CFG_POST & CFG_SYS_POST_RTC */