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/xhci-rcar.c b/drivers/usb/host/xhci-rcar.c
index d86584b..b3675bb 100644
--- a/drivers/usb/host/xhci-rcar.c
+++ b/drivers/usb/host/xhci-rcar.c
@@ -9,6 +9,7 @@
 #include <clk.h>
 #include <dm.h>
 #include <fdtdec.h>
+#include <log.h>
 #include <malloc.h>
 #include <usb.h>
 #include <wait_bit.h>