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/ti/common/board_detect.c b/board/ti/common/board_detect.c
index 3938dea..4296684 100644
--- a/board/ti/common/board_detect.c
+++ b/board/ti/common/board_detect.c
@@ -9,6 +9,7 @@
 
 #include <common.h>
 #include <eeprom.h>
+#include <log.h>
 #include <net.h>
 #include <asm/arch/hardware.h>
 #include <asm/omap_common.h>