common: Remove <common.h> and add needed includes

Remove <common.h> from all "commmon/" files and when needed add
missing include files directly.

Signed-off-by: Tom Rini <trini@konsulko.com>
diff --git a/common/board_r.c b/common/board_r.c
index da0b80f..c823cd2 100644
--- a/common/board_r.c
+++ b/common/board_r.c
@@ -9,7 +9,7 @@
  * Marius Groeger <mgroeger@sysgo.de>
  */
 
-#include <common.h>
+#include <config.h>
 #include <api.h>
 #include <bootstage.h>
 #include <cpu_func.h>