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/video/bus_vcxk.c b/drivers/video/bus_vcxk.c
index e87c66d..2a72d23 100644
--- a/drivers/video/bus_vcxk.c
+++ b/drivers/video/bus_vcxk.c
@@ -6,6 +6,7 @@
 
 #include <common.h>
 #include <bmp_layout.h>
+#include <log.h>
 #include <asm/io.h>
 
 vu_char  *vcxk_bws      = ((vu_char *) (CONFIG_SYS_VCXK_BASE));