common: Drop log.h from common header

Move this header out of the common header.

Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/board/freescale/common/zm7300.c b/board/freescale/common/zm7300.c
index acd5343..03679e7 100644
--- a/board/freescale/common/zm7300.c
+++ b/board/freescale/common/zm7300.c
@@ -5,6 +5,7 @@
 
 /* Power-One ZM7300 DPM */
 #include "zm7300.h"
+#include <log.h>
 
 #define DPM_WP 0x96
 #define WRP_OPCODE 0x01