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-mx5.c b/drivers/usb/host/ehci-mx5.c
index 0b32728..82f99e9 100644
--- a/drivers/usb/host/ehci-mx5.c
+++ b/drivers/usb/host/ehci-mx5.c
@@ -5,6 +5,7 @@
  */
 
 #include <common.h>
+#include <log.h>
 #include <usb.h>
 #include <errno.h>
 #include <linux/compiler.h>