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/arch/microblaze/cpu/timer.c b/arch/microblaze/cpu/timer.c
index e07fc62..cd4aba6 100644
--- a/arch/microblaze/cpu/timer.c
+++ b/arch/microblaze/cpu/timer.c
@@ -8,6 +8,7 @@
 #include <common.h>
 #include <fdtdec.h>
 #include <init.h>
+#include <log.h>
 #include <time.h>
 #include <asm/microblaze_timer.h>
 #include <asm/microblaze_intc.h>