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-fsl.c b/drivers/usb/host/ehci-fsl.c
index ced295e..75d24ae 100644
--- a/drivers/usb/host/ehci-fsl.c
+++ b/drivers/usb/host/ehci-fsl.c
@@ -9,6 +9,7 @@
 
 #include <common.h>
 #include <env.h>
+#include <log.h>
 #include <pci.h>
 #include <usb.h>
 #include <asm/io.h>