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/drivers/usb/host/ehci-armada100.c b/drivers/usb/host/ehci-armada100.c
index 85a8adf..2ce9f27 100644
--- a/drivers/usb/host/ehci-armada100.c
+++ b/drivers/usb/host/ehci-armada100.c
@@ -11,6 +11,7 @@
  */
 
 #include <common.h>
+#include <log.h>
 #include <asm/io.h>
 #include <usb.h>
 #include "ehci.h"