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/virtio/virtio_mmio.c b/drivers/virtio/virtio_mmio.c
index 60ece13..184c5f0 100644
--- a/drivers/virtio/virtio_mmio.c
+++ b/drivers/virtio/virtio_mmio.c
@@ -9,6 +9,7 @@
 
 #include <common.h>
 #include <dm.h>
+#include <log.h>
 #include <virtio_types.h>
 #include <virtio.h>
 #include <virtio_ring.h>